A Carrollton police officer responding to a call has been involved in a car crash.
The officer, whose name has not been released, was struck in the intersection of Frankford Road and Marsh Lane.
The officer was nearly stopped in the intersection when a truck pulled around traffic yielding to the officer and collided with his police car, officials say.
The collision knocked the officer unconscious for a couple of minutes, though he is expected to be OK. He was transported to an area hospital as a precaution.
The officer was going to assist another officer and was using his lights and sirens at the time of the crash.
The driver of the truck was not injured.
The Dallas Police Department is investigating the crash.