A suspect in a shooting at a Dallas high school that wounded four students and drew a heavy police response to the campus has been taken into custody, school district officials announced Tuesday night.

Jason Evans, a Dallas Fire-Rescue spokesman, told the Dallas Morning News that three of the students were between the ages of 15 and 18 and that all were injured by gunfire. A 17-year-old suspect was booked into Dallas County jail at 9:32 p.m. after turning himself in, the paper reported. His bail was set at $600,000.

Hours after the shooting, officials said the suspect, who has yet to be apprehended, had evaded security protocols at Wilmer-Hutchins High School.