HOUSTON, Texas (KTRK) -- An investigation is underway after a reported assault involving several people led to a heavy police presence at Yellowstone School on Tuesday morning.

SkyEye13 was over the scene at Trulley and Briley Street just after 9 a.m. and spotted several police cars, ambulances, and officers surrounding the campus.

At one point, an empty stretcher was seen being pulled away from the school.