Virginia — When a gunman opened fire at Virginia’s Old Dominion University, on Thursday, killing an instructor and injuring two other people, Reserve Officers’ Training Corps (ROTC) students stepped in to subdue and kill the suspect, officials said.

The suspect, identified as Mohamed Jalloh, a former Army National Guardsman who was convicted of giving material support to ISIS, allegedly was trying to commit a terrorist attack, FBI Special Agent in Charge Dominique Evans told reporters.

The gunman opened fire in Constant Hall, an academic building, around 10:43 a.m. and was found dead minutes after officers arrived, Old Dominion University Police Chief Garrett Shelton said during a press briefing.

Virginia Gov. Abigail Spanberger identified the person who was killed as Lt. Col. Brandon Shah.