FBI: Fort Lauderdale shooting suspect says he carried out the attack on behalf of ISIS

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Esteban Santiago, who was arrested on charges of killing five people and injuring six more in a shooting earlier this month at Fort Lauderdale-Hollywood International Airport, said he carried out the attack on behalf of the Islamic State, according to the FBI.

FBI special agent Michael Ferlazzo and other agents testified at Santiago's bond hearing on Tuesday, and Ferlazzo said Santiago had claimed to have spoken with other purported jihadis in chatrooms and websites inspired by the Islamic State, the terrorist group also known as ISIS or ISIL.

Related: Shooting at Ft. Lauderdale-Hollywood International Airport

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FORT LAUDERDALE, FL - JANUARY 06: Police direct traffic outside of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and eight wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)

Esteban Santiago, is shown in this booking photo provided by the Broward County Sheriff's Office in Fort Lauderdale, Florida, January 7, 2017.

(Courtesy Broward County Sheriff's Office/Handout via REUTERS)

Police question people who are evacuating from Fort Lauderdale-Hollywood International Airport near the tarmac after airport shooting in Florida, U.S., January 6, 2017. REUTERS/Andrew Innerarity

Esteban Santiago, the suspect in the mass shooting at Fort Lauderdale International Airport, is transported to the Broward County Main Jail by authorities on Saturday, Jan. 7, 2017.

(Jim Rassol/Sun Sentinel/TNS via Getty Images)

FORT LAUDERDALE, FL - JANUARY 06: People wait on the tarmac of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and eight wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)
Law enforcement personnel search the grounds after a shoot opened fire at a baggage carousel at Fort Lauderdale-Hollywood International Airport in Fort Lauderdale, Florida, U.S., January 6, 2017. REUTERS/Zachary Fagenson
A man is helped after airport shooting at Fort Lauderdale-Hollywood International Airport in Florida, U.S., January 6, 2017. Courtesy Mike Starobinsky/Maxwillsolutions/Handout via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY. NO RESALES. NO ARCHIVE.

Airport security personnel stand in front of one of the entrances to the baggage area of Terminal 2, where yesterday a shooter killed five people and wounded six others before he was taken into custody, at the Fort Lauderdale-Hollywood International airport on January 7, 2017 in Fort Lauderdale, Florida. The alleged gunman, Esteban Santiago, 26, is reported to have flown from Alaska to Florida with a gun in a checked bag, and after landing used the gun to shoot people.

(Photo by Joe Raedle/Getty Images)

Shooting victims are unloaded from an emergency vehicle and taken into Broward Health Trauma Center Friday, Jan. 6, 2017 in Fort Lauderdale, Fla. Authorities said multiple people have died after a lone suspect opened fire at the Ft. Lauderdale-Hollywood International Airport. (Taimy Alvarez/South Florida Sun-Sentinel/TNS via Getty Images)

Broward County Sheriff officers exit from the escalator that takes people from the baggage area of Terminal 2 where yesterday a shooter killed five people and wounded six others before he was taken into custody, at the Fort Lauderdale-Hollywood International airport on January 7, 2017 in Fort Lauderdale, Florida. The alleged gunman, Esteban Santiago, 26, is reported to have flown from Alaska to Florida with a gun in a checked bag, and after landing used the gun to shoot people.

(Photo by Joe Raedle/Getty Images)

A shooting victim is unloaded from an emergency vehicle and taken into Broward Health Trauma Center Friday, Jan. 6, 2017 in Fort Lauderdale, Fla. Authorities said multiple people have died after a lone suspect opened fire at the Ft. Lauderdale-Hollywood International Airport. (Taimy Alvarez/South Florida Sun-Sentinel/TNS via Getty Images)
A shooting victim is unloaded from an emergency vehicle and taken into Broward Health Trauma Center Friday, Jan. 6, 2017 in Fort Lauderdale, Fla. Authorities said multiple people have died after a lone suspect opened fire at the Ft. Lauderdale-Hollywood International Airport. (Taimy Alvarez/South Florida Sun-Sentinel/TNS via Getty Images)
A shooting victim is unloaded from an emergency vehicle and taken into Broward Health Trauma Center Friday, Jan. 6, 2017 in Fort Lauderdale, Fla. Authorities said multiple people have died after a lone suspect opened fire at the Ft. Lauderdale-Hollywood International Airport. (Taimy Alvarez/South Florida Sun-Sentinel/TNS via Getty Images)
Travelers and airport workers are evacuated out of the terminal after airport shooting at Fort Lauderdale-Hollywood International Airport in Florida, U.S., January 6, 2017. REUTERS/Andrew Innerarity
Travelers are evacuated out of the terminal and onto the tarmac after airport shooting at Fort Lauderdale-Hollywood International Airport in Florida, U.S., January 6, 2017. REUTERS/Zachary Fagenson
Law enforcement walk outside a terminal after a shooter opened fire at a baggage carousel at Fort Lauderdale-Hollywood International Airport in Fort Lauderdale, Florida, U.S., January 6, 2017. REUTERS/Zachary Fagenson
Law enforcement personnel take cover below a stairwell in a parking garage opposite a terminal after a shooter opened fire at a baggage carousel at Fort Lauderdale-Hollywood International Airport in Fort Lauderdale, Florida, U.S., January 6, 2017. REUTERS/Zachary Fagenson
FORT LAUDERDALE, FL - JANUARY 06: Police assist people seeking cover outside of Terminal 2 at Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and eight wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)
FORT LAUDERDALE, FL - JANUARY 06: People seek cover on the tarmac of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and eight wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)
FORT LAUDERDALE, FL - JANUARY 06: People take cover outsideTerminal 2 of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and 8 wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)
FORT LAUDERDALE, FL - JANUARY 06: People take cover behind cars outside of Terminal 2 of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and 8 wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)
FORT LAUDERDALE, FL - JANUARY 06: People wait on the tarmac of Fort Lauderdale-Hollywood International airport after a shooting took place near the baggage claim on January 6, 2017 in Fort Lauderdale, Florida. Officials are reporting that five people wear killed and eight wounded in an attack from a single gunman. (Photo by Joe Raedle/Getty Images)

Esteban Santiago, the suspect in the mass shooting at Fort Lauderdale International Airport, is transported to the Broward County Main Jail by authorities on Saturday, Jan. 7, 2017.

(Jim Rassol/Sun Sentinel/TNS via Getty Images)

A shooting victim is unloaded from an emergency vehicle and taken into Broward Health Trauma Center Friday, Jan. 6, 2017 in Fort Lauderdale, Fla. Authorities said multiple people have died after a lone suspect opened fire at the Ft. Lauderdale-Hollywood International Airport. (Taimy Alvarez/South Florida Sun-Sentinel/TNS via Getty Images)
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Ferlazzo did not specify whether Santiago claimed he was working directly with ISIS or had only been influenced by the group, according to CNN.

He testified that after the shooting Santiago said his mind was under some form of government control.

Santiago is charged with using and carrying a firearm during and in relation to a crime of violence, performing an act of violence against a person at an airport serving international civil aviation that caused serious bodily injury, and causing the death of a person through the use of a firearm. He could receive the death penalty for the last two charges against him and a maximum of life in prison for the first.

Santiago had been on the FBI's radar for weeks before the attack in Fort Lauderdale, Florida. FBI spokesman George Piro said that Santiago walked into an FBI office in Anchorage, Alaska, in November and told authorities that voices in his head were telling him to join ISIS.

Santiago was taken into custody at the time, admitted to a facility for medical evaluation, and given antianxiety medications, according to the Associated Press.

He was released from the facility after five days without any restrictions that might prevent him from buying or owning a firearm.

A 9 mm handgun that authorities say Santiago checked into his baggage and used to carry out the shooting was the same as one that police officers in Anchorage had seized and later returned to Santiago, Ferlazzo said.

At the hearing on Tuesday, Assistant US District Attorney Rick Del Toro said Santiago was a flight risk and a danger to the community. Santiago's attorney, Robert Berube, did not refute the claim and said his defendant was prepared to be detained throughout the trial, according to CNN.

Judge Lurana Snow ruled that Santiago be held without bond. His next hearing is scheduled for January 30.

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