April 24 (UPI) — Authorities in Dallas are searching for a gunman who shot and critically injured two police officers Tuesday.

The Dallas Police Department confirmed two officers and a civilian were shot. The two officers were helping an off-duty officer serve a warrant at a Home Depot, when they were shot by the suspect, WFAA-TV in Dallas reported.

A male officer, 27 was shot in the head and a female officer was shot in the face. The condition of the civilian is unknown.

More than a dozen police cars and a police search dog were on the scene and searching for the suspect.

The Bureau of Alcohol, Tobacco and Firearms also tweeted it was responding to the incident.