Dallas police say they responded to a shooting call around 1 p.m.
There are several emergency vehicles in the 5500 block of Langdon Road, which is where the high school is located.
Images from SKY 4 show a heavy police response at the school with numerous ambulance vehicles.
Dallas ISD says safety protocols are in place.
SKY 4 captured shots of several students leaving the building and heading toward Wilmer-Hutchins Eagle Stadium.
