The chief of police for the Dallas Independent School District says the student who shot four students when he opened fire at a Dallas high school this week was in and out of the building in less than two minutes and is believed to have been targeting a specific student.

A 17-year-old student was arrested following a shooting at Wilmer-Hutchins High School in Dallas that injured students.

The student accused of injuring four in a shooting at a Dallas high school was let into the building through an unsecured door and then walked down a hallway toward a group of students, opening fire on them before appearing to take a point-blank shot at one.

Hours after the shooting, officials said the suspect had evaded security protocols at Wilmer-Hutchins High School.

School district officials say 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.

A shooting has been reported at a high school in Dallas.