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.

Police were investigating a reported shooting Tuesday afternoon at Wilmer-Hutchins High School in Dallas, a department spokeswoman confirmed to The Dallas Morning News. Officers were dispatched about 1 p.m. to the school in the 5500 block of Langdon Road. A police call log showed 19 units at the scene.

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