Copycat threats soar over 600 after Fla. school shooting massacre

More than 600 copycat threats have been made across the country – just two weeks after a gunman killed 17 people and wounded over a dozen at Florida high school last month, data shows.

Texas had the most threats with 55 reports, Ohio had 47, California received 37, Florida had 35, and 32 reports were made in Pennsylvania, USA Today reported citing data from the Educator's School Safety Network.

The group found 638 threats were made after the Valentine’s Day massacre at Marjory Stoneman Douglas High School in Parkland, Fla.

49 PHOTOS
Shooting at Marjory Stoneman Douglas High School in Florida
See Gallery
Shooting at Marjory Stoneman Douglas High School in Florida
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
PARKLAND, FL - FEBRUARY 14: People wait for loved ones as they are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Eva Claire HAMBACH (Photo credit should read EVA CLAIRE HAMBACH/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students are released from a lockdown outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
Medical personnel tend to a victim outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
Medical personnel tend to a victim outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
Police and security vehicles are seen at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve SANDBERG / The erroneous mention[s] appearing in the metadata of this photo by Michele Eve SANDBERG has been modified in AFP systems in the following manner: [Byline: Michele Eve SANDBERG] instead of [Eva Hambach]. Please immediately remove the erroneous mention from all your online services and delete it from your servers. If you have been authorized by AFP to distribute it to third parties, please ensure that the same actions are carried out by them. Failure to promptly comply with these instructions will entail liability on your part for any continued or post notification usage. Therefore we thank you very much for all your attention and prompt action. We are sorry for the inconvenience this notification may cause and remain at your disposal for any further information you may require. (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: The Marjory Stoneman Douglas High School is seen after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Security speak with people near Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michelle Eve SANDBERG (Photo credit should read MICHELLE EVE SANDBERG/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students gather following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami, February 14, 2018 . A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
A student wears a Valentine's pin as she leaves Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: Fire Rescue personnel work the scene at the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Police and fire rescue vehicles converge on Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
MAJORY STONEMAN DOUGLAS HIGH SCHOOL, PARKLAND, FLORIDA - OCTOBER 31, 2017: Marjory Stoneman Douglas High School in Parkland, Broward County, Florida. (Photo DigitalGlobe via Getty Images)
Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Parents confer with security following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami, February 14, 2018 . A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Police officers ride in the back of a pick up truck with a victim outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
A law enforcement officer directs traffic outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
A young woman who just walked out from the direction of the high school, who refused to give her name, gets a hug as she reaches the overpass at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Marjorie Stonemason Douglas High School where a shooting occurred on Wednesday, Feb. 14, 2018 in Parkland, Fla. (Amy Beth Bennett/Sun Sentinel/TNS via Getty Images)
A student reacts as she talks to a television reporter at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
SWAT vehicles converge on Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
Students react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
People react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students are released from a lockdown outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students are evacuated by police out of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018. (Mike Stocker/Sun Sentinel/TNS via Getty Images)
PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused 'numerous fatalities' and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody. / AFP PHOTO / Michele Eve Sandberg (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Students are brought across Coral Springs Drive from the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018. (Amy Beth Bennett/Sun Sentinel/TNS via Getty Images)
Waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018. (Amy Beth Bennett/Sun Sentinel/TNS via Getty Images)
SWAT vehicles converge on Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter on Wednesday, Feb. 14, 2018. (John McCall/Sun Sentinel/TNS via Getty Images)
Waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018. (Amy Beth Bennett/Sun Sentinel/TNS via Getty Images)
Trauma surgeon Dr. Igor Nichiporenko (C) and director for emergency medicine Dr. Evan Boyar (R) address the media outside the Broward Health Emergency facility where victims were taken following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. Seventeen people were killed when a 19-year-old former student opened fire with a semi-automatic rifle at the Florida high school, the local sheriff said, calling the scene 'horrific.' Broward County Sheriff Steve Israel said the victims were a mix of students and adults, though he could not confirm if the adults were teachers. / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018. (Amy Beth Bennett/Sun Sentinel/TNS via Getty Images)
Florida Governor Rick Scott (4th-L) visits Marjory Stoneman Douglas High School following a shooting that killed 17 people on February 14, 2018 in Parkland, Florida. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for 'disciplinary reasons.' / AFP PHOTO / Gaston De Cardenas (Photo credit should read GASTON DE CARDENAS/AFP/Getty Images)
BROWARD, UNITED STATES - FEBRUARY 14: Students meet their families following a school shooting at Marjory Stoneman Douglas High School in Broward, Florida on February 14, 2018. At least 17 people were killed Wednesday when a lone gunman opened fire on a Florida high school, according to police. The victims are a mix of students and adults, officials said. (Photo by Carlos Miller/Anadolu Agency/Getty Images)
Police vehicles block the road to Marjory Stoneman Douglas High School in Parkland, Florida, following a shooting that killed 17 people on February 14, 2018 in Parkland, Florida. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for 'disciplinary reasons.' / AFP PHOTO / Gaston De Cardenas (Photo credit should read GASTON DE CARDENAS/AFP/Getty Images)
PARKLAND, FL - FEBRUARY 14: Nathanael Clark (L) and his father, John Clark, speak to the media after Nathanael escaped the shooting at Marjory Stoneman Douglas High School that killed 17 people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
PARKLAND, FL - FEBRUARY 14: Sarah Crescitelli leans on her mother, Stacy Crescitelli (L) after she escaped the shooting at Marjory Stoneman Douglas High School that killed 17 people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene. (Photo by Joe Raedle/Getty Images)
The location where suspect Nikolas Cruz was caught by police at a townhouse in Pelican Pointe at Wyndham Lakes in Coral Cables, Florida following the deadly shooting at Marjory Stoneman Douglas High School in Parkland, Florida on Febreuary 14, 2018. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for 'disciplinary reasons.' / AFP PHOTO / Michele Eve SANDBERG (Photo credit should read MICHELE EVE SANDBERG/AFP/Getty Images)
Parents meet at the Fort Lauderdale Marriott Coral Springs Hotel to pick up their children following a mass shooting at nearby Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (Jim Rassol/Sun Sentinel/TNS via Getty Images)
Parents meet at the Fort Lauderdale Marriott Coral Springs Hotel to pick up their children following a mass shooting at nearby Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (Jim Rassol/Sun Sentinel/TNS via Getty Images)
HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

The threats prompted 33 school closings and 15 lockdowns, according to a USA Today review of the incidents.

Experts say students don’t measure the consequences of making threats whether it’s verbal or online.

“Everyone knows you don't say 'bomb' in an airport. We have to get to that point with kids on this issue,” Amanda Klinger, director of operations for the Educator's School Safety Network, told USA Today. “We need to make it clear that this isn't OK, and it is incredibly serious.”

The threats have led to dozens of arrests, which Dr. Scott Poland, a psychology professor at Nova Southeastern University in Florida, previously told the Daily News stems from national coverage of school shootings.

President Trump proposed arming teachers to protect students from mass shootings, but Democrats, Republicans, and educators have opposed the idea.

20 PHOTOS
Tragedies at schools throughout history
See Gallery
Tragedies at schools throughout history
Columbine high school students run from the school after gunmen opened fire on terrified students, killing up to 25 people before taking their own lives April 20, police said. Jeff Stone, sheriff of Jefferson County, said the gunmen, students at the school, were found dead in the library on what he called a "suicide mission. GCC/RC

PARKLAND, FL - FEBRUARY 14: People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

(Photo by Joe Raedle/Getty Images)

School Number One, where the Beslan school hostage crisis and massacre took place on September 1, 2004, when a group of armed terrorists took around 1100 people hostage, including 777 children, demanding an end to the Second Chechen War. On the third day of the standoff, Russian security forces stormed the school. 334 hostages were killed, including 186 children, with hundreds wounded or missing.

(Photo by Alvaro Ybarra Zavala/Edit by Getty Images)

Twenty-seven wooden angel figures are seen placed in a wooded area beside a road near the Sandy Hook Elementary School for the victims of a school shooting in Newtown, Connecticut December 16, 2012. Twelve girls, eight boys and six adult women were killed in the shooting on Friday at the Sandy Hook Elementary School in Newtown. REUTERS/Mike Segar (UNITED STATES - Tags: CRIME LAW EDUCATION TPX IMAGES OF THE DAY)
On May 21, 1927, after killing his wife, farmer Andrew Kehoe set fire to his own farm. He then destroyed the Bath Consolidated School, killing dozens of people, and then detonated his own dynamite and shrapnel filled car in front of the school, killing himself and several others. In all, 45 people died, most of them children.

(Bettmann via Getty Images)
Virginia Tech students hold candles during a memorial service and candlelight vigil for fallen Virginia Tech police officer Deriek W. Crouse on the campus of Virginia Tech in Blacksburg, Virginia December 9, 2011. A man who fatally shot the Virginia Tech police officer on Thursday apparently died of a self-inflicted gunshot wound, Virginia State police said on Friday. The incident prompted a lockdown of the campus on Thursday and revived memories of a gunman's 2007 rampage that left 33 people dead in one of the worst shooting incidents in U.S. history. REUTERS/Chris Keane (UNITED STATES - Tags: CIVIL UNREST EDUCATION CRIME LAW TPX IMAGES OF THE DAY)

Students are reunited with families at a staging ground set up at the Roswell Mall following an early morning shooting at Berrendo Middle School in Roswell, New Mexico, January 14, 2014. A shooter opened fire at a middle school in New Mexico on Tuesday, seriously wounding at least two teenage students before being taken into custody, police and hospital officials said.

(REUTERS/Mark Wilson/Roswell Daily Record)

Policeman stands guard outside a school where a shooting incident took place in Winnenden March 11, 2009. A 17-year old gunman went on a shooting spree at his former secondary school, the Albertville-Realschule in Winnenden in southwest Germany on Wednesday, killing up to 15 people before dying himself in a shootout with police at the car dealer, authorities said.

(REUTERS/Kai Pfaffenbach)

A woman cowers in fear behind a statue while a man lies wounded a few feet away, victim of sniper Charles Whitman. Whitman killed a dozen people firing a rifle from the observation deck of the University of Texas Tower in Austin.

(Bettmann via Getty Images)

Friends of the late Rebecka Ann Carnes, an Umpqua Community College mass shootings victim, embrace one another in prayer before the start of a memorial service at Riverbend Park to remember the victims of the mass shooting at Umpqua Community College in nearby Roseburg on October 3, 2015 in Winston, Oregon. On Thursday 26-year-old Chris Harper Mercer went on a shooting rampage at the college killing nine people and wounding another nine before killing himself.

(Photo by Marcus Yam/Los Angeles Times via Getty Images)

Red Lake Senior High School in Red Lake, Minnesota, is shown March 22, 2005. A high school student at Red Lake Senior High School allegedly killed nine people March 21 before turning the gun on himself on the northern Minnesota Indian reservation.

(REUTERS/John Gress)

Police officers walk on Edgewater Drive after a shooting at Oikos University in Oakland, California April 2, 2012. A gunman killed at least three people and wounded others at the private Christian college in Oakland, California, on Monday, and a suspect has been taken into custody, authorities said.

(REUTERS/Stephen Lam)

A man places a rose after lighting candles in front of portraits of the victims of the Taliban attack on the Army Public School in Peshawar, during a candlelight vigil in Lahore December 19, 2014. At least 132 students and nine staff members were killed on Tuesday when Taliban gunmen broke into the school and opened fire, witnesses said, in the bloodiest massacre the country has seen for years.

(REUTERS/Mohsin Raza)

People hold candles alongside wooden crosses during a vigil for the victims of an attack claimed by Al Shabaab insurgents on April 7, 2015 in Nairobi, Kenya. 148 people were killed by the militants during the attack on the Garissa University College on April 02, 2015.

(Jennifer Huxta / Barcroft Media via Getty Images)

Columbine high school shooters Eric Harris (L) and Dylan Klebold appear in this video capture of a surveillance tape released by the Jefferson County Sheriff's Department in the cafeteria at Columbine High School April 20, 1999 in Littleton, CO during their shooting spree which killed 13 people.

(Photo courtesy of Jefferson County Sheriff's Department via Getty Images)

A police officer stands guard at Dunblane primary school, Scotland, shortly after the shooting incident on the premises. The Dunblane school massacre was one of the deadliest mass murders in UK history, when gunman Thomas Hamilton killed sixteen children and one teacher at Dunblane primary school near Stirling, Scotland on 13 March 1996, before killing himself. As a result of the killings, two new Firearms Acts were passed, which effectively made private ownership of handguns illegal in Great Britain.

(Photo by Colin McPherson/Corbis via Getty Images)

Erfurt, GERMANY: FILES - A picture taken 02 May 2002 shows flowers laid down in commemoration for the victims of an amok run in front of the Gutenberg High School in the eastern city of Erfurt. The principal of the school where a former pupil shot 16 people dead and then himself in September 2002 said the US campus massacre had ripped open painful wounds. 'When we see these pictures from Virginia the memories come flooding back,' Christiane Alt, principal of Gutenberg High School, told the mass-selling daily Bild. 'We understand what the people there are going through. It pains us to see that hardly anything is learned from such horrible events.'

(JENS-ULRICH KOCH/AFP/Getty Images)

Women gather in Nathan Phillips Square to remember the Dec. 6; 1989; slaying of 14 women at University of Montreal's Ecole Polytechnique.

(Photo by Rick Eglinton/Toronto Star via Getty Images)

A combination picture of images taken from a security camera video distributed by the Rio police shows students running from the classroom where gunman Wellington Menezes de Oliveira, 24, opened fire and then Menezes de Oliveira (bottom R) leaving the same classroom inside the Tasso da Silveira school with a gun in his hand, in the Realengo neighborhood of Rio de Janeiro April 7, 2011. The gunman killed 11 students in a shooting spree at the school before killing himself, police said.

(REUTERS/Rio Police/Handout)

A man and a boy, relatives of a student killed on Monday, wait near a kindergarten in Shiguan village in the city of Gongyi, central China's Henan province May 8, 2006. Bai Ningyang, a 19-year-old native set fire on Monday to a classroom of a local kindergarten, killing 3 students and wounding another 13 students and a teacher, police said.

(CHINA OUT REUTERS/China Daily)

HIDE CAPTION
SHOW CAPTION
of
SEE ALL
BACK TO SLIDE

Read Full Story