Police say suspected Maryland school shooter used his father's legally purchased handgun

March 21 (Reuters) - A 17-year-old Maryland high school student used his father's legally purchased handgun to shoot a female student with whom he had been in a recently ended relationship, police said on Wednesday.

Austin Rollins brought his father's Glock 9-millimeter pistol to Great Mills High School on Tuesday morning and shot the 16-year-old girl in a hallway, gravely injuring her, St. Mary's County Sheriff's Office said in a statement.

The shooting in Great Mills, located about 70 miles (113 km) south of Washington, came five weeks after a high school massacre in Florida and days before a student-led march in the U.S. capital for tougher gun laws.

"All indications suggest the shooting was not a random act of violence," the police statement said. "Rollins and the female victim had a prior relationship which recently ended."

Attempts to reach Rollins' family have not been successful.

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Shooting at Great Mills High School in Maryland
Maryland State Troopers are seen on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
LEONARDTOWN, MD - MARCH 20: A student from Great Mills High School is comforted be her guardians while being picked up at Leonardtown High School following a school shooting at Great Mills High School March 20, 2018 in Leonardtown, Maryland. Early reports indicate two students were wounded in the school shooting and the gunman died at the scene. Students from Great Mills High School were evacuated to nearby Leonardtown High School following the shooting. (Photo by Win McNamee/Getty Images)
LEONARDTOWN, MD - MARCH 20: A heavily armed law enforcement officer stands guard as students from Great Mills High School are evacuated to Leonardtown High School following a school shooting at Great Mills High School March 20, 2018 in Leonardtown, Maryland. Early reports indicate two students were wounded in the school shooting and the gunman died at the scene. Students from Great Mills High School were evacuated to nearby Leonardtown High School following the shooting. (Photo by Win McNamee/Getty Images)
A sign is seen in front of the Great Mills High School in Great Mills, Maryland after a shooting at the school on March 20, 2018 . A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
LEONARDTOWN, MD - MARCH 20: A student from Great Mills High School is comforted be her guardian while being picked up at Leonardtown High School following a school shooting at Great Mills High School March 20, 2018 in Leonardtown, Maryland. Early reports indicate two students were wounded in the school shooting and the gunman died at the scene. Students from Great Mills High School were evacuated to nearby Leonardtown High School following the shooting. (Photo by Win McNamee/Getty Images)
Emergency personnel and law enforcement officers stand outside Great Mills High School following a shooting on Tuesday morning in St. Mary's County, Maryland, U.S., March 20, 2018. REUTERS/Sait Serkan Gurbuz
Emergency services and law enforcement vehicles are seen outside the Great Mills High School following a shooting on Tuesday morning in St. Mary's County, Maryland, U.S., March 20, 2018. REUTERS/Sait Serkan Gurbuz
LEONARDTOWN, MD - MARCH 20: Students from Great Mills High School walk to meet their parents at Leonardtown High School following a school shooting at Great Mills High School March 20, 2018 in Leonardtown, Maryland. Early reports indicate two students were wounded in the school shooting and the gunman died at the scene. Students from Great Mills High School were evacuated to nearby Leonardtown High School following the shooting. (Photo by Win McNamee/Getty Images)
Law enforcement vehicles are seen outside the Great Mills High School following a shooting on Tuesday morning in St. Mary's County, Maryland, U.S., March 20, 2018. REUTERS/Sait Serkan Gurbuz
Emergency personnel and law enforcement officers stand outside Great Mills High School following a shooting on Tuesday morning in St. Mary's County, Maryland, U.S., March 20, 2018. REUTERS/Sait Serkan Gurbuz
GREAT MILLS, MD - MARCH 20: Maryland Governor Larry Hogan, briefs the media about a shooting this morning at Great Mills High School on March 20, 2018 in Great Mills, Maryland. Two students were shot after another student opened fire in the hallway before being shot and killed by a school resource officer. (Photo by Mark Wilson/Getty Images)
Frank Lanham (2nd R), a teacher at Great Mills High School leaves Leonardtown High School in Leonardtown, Maryland, U.S., March 20, 2018. Great Mills students and parents reunited at Lenoardtown after the shooting at their school. REUTERS/Sait Serkan Gurbuz
Great Mills High School 10th grade student Niyah Norton and her mother Chanda leave Leonardtown High School in Leonardtown, Maryland, U.S., March 20, 2018. Great Mills students and parents reunited at Lenoardtown after the shooting at their school. REUTERS/Sait Serkan Gurbuz
Law enforcement vehicles are parked in front of the Great Mills High School in Great Mills, Maryland after a shooting at the school on March 20, 2018 . A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Great Mills High School senior Wayne Waul (2nd L) and his mother Jill Ryan (4th L) leave Leonardtown High School in Leonardtown, Maryland, U.S., March 20, 2018. Great Mills students and parents reunited at Lenoardtown after the shooting at their school. REUTERS/Sait Serkan Gurbuz
Emergency services and law enforcement vehicles are seen outside the Great Mills High School following a shooting on Tuesday morning in St. Mary's County, Maryland, U.S., March 20, 2018. REUTERS/Sait Serkan Gurbuz
Maryland State Troopers are seen on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
A Sheriff's car is seen on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
GREAT MILLS, MD - MARCH 20: School buses are lined up in front of Great Mills High School after a shooting on March 20, 2018 in Great Mills, Maryland. It was reported that two students at a Maryland high school were injured after a colleague opened fire in the hallway just before classes began. (Photo by Mark Wilson/Getty Images)
LEONARDTOWN, MD - MARCH 20: A student from Great Mills High School is comforted by a guardian while being picked up at Leonardtown High School following a school shooting at Great Mills High School March 20, 2018 in Leonardtown, Maryland. Early reports indicate two students were wounded in the school shooting and the gunman died at the scene. Students from Great Mills High School were evacuated to nearby Leonardtown High School following the shooting. (Photo by Win McNamee/Getty Images)
School buses, security and State Troopers are seen on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Great Mills High School senior Wayne Waul (2nd L) and his mother Jill Ryan (4th L) leave Leonardtown High School in Leonardtown, Maryland, U.S., March 20, 2018. Great Mills students and parents reunited at Lenoardtown after the shooting at their school. REUTERS/Sait Serkan Gurbuz
A man looks out of a school bus on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
Great Mills High School senior Wayne Waul leaves Leonardtown High School in Leonardtown, Maryland, U.S., March 20, 2018. Great Mills students and parents reunited at Lenoardtown after the shooting at their school. REUTERS/Sait Serkan Gurbuz
Hi Twitter. I am in Great Mills HS. My school is on a very real lockdown threat and there’s already someone possibl… https://t.co/e1b8b5K2iQ
A shooting investigation is underway at Great Mills High School in Great Mills, Maryland. Multiple injuries have be… https://t.co/S4YypMbEQr
Shooting at Great Mills High School in Maryland, school confirms via the @FoxNews App https://t.co/gK1xdyxhaQ
As I'm dropping my little sister off at LHS I have about a dozen cop cars and two ambulances fly down the road past… https://t.co/HHjzr3PlVR
BREAKING: School shooting reported in Maryland. School officials confirm Great Mills High School is on lockdown.… https://t.co/8Hfl1yJoC2
We are aware of the situation at Great Mills High School. GMHS parents, please report to our auditorium. Leonardtow… https://t.co/S0W3HJXeew
School buses, security and State Troopers are seen on March 20, 2018 at Great Mills High School in Great Mills, Maryland after a shooting at the school. A shooting took place at a high school in the eastern US state of Maryland on Tuesday, officials said, reportedly leaving several people injured just days before a nationwide student-organized march against school violence. Three people were shot in the incident at Great Mills High School, located about a 90-minute drive southeast of the US capital Washington, according to a county official quoted by The Baltimore Sun.Three people, including the assailant, were in critical condition after a shooting at a high school in the eastern US state of Maryland on Tuesday, officials said. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)
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School resource officer Blaine Gaskill confronted Rollins and fired one shot at him, as Rollins simultaneously fired a shot, according to police. Rollins died hours later at a hospital. The officer was not harmed.

A 14-year-old student who was shot in the leg during the incident, whom the sheriff's office identified as Desmond Barnes, was released from the hospital on Wednesday, a hospital spokesman said. The female victim, identified as Jaelynn Willey by her family, remains in critical condition, the sheriff's office said.

An autopsy is being carried out on Rollins to determine whether he was killed by a shot fired by the officer or from a self-inflicted gunshot. Investigators also remain uncertain over who fired the shot that hit Barnes, a spokeswoman for the sheriff's office said.

The investigation has not found any social media threats made by Rollins, the sheriff's office said.

Kai Davis, a former classmate of Rollins, pointed to his access to a gun.

"Some of us were friends with Austin before he did this. He wasn't alone, He wasn't bullied noticeably. He wasn't some kid everyone hated. He had a girlfriend. He had friends," tweeted Davis, who transferred to another school two months ago. "But he had access to a semi-automatic glock."

The school will remain closed for the remainder of the week as the investigation continues, principal Jake Heibel said in a statement. He did not respond to a request for further comment. (Reporting by Andrew Hay and Sheila Dang; Editing by Leslie Adler)

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