FORT WORTH (July 1, 2009)--The Texas Alcoholic Beverage Commission is investigating its joint raid with Fort Worth police on a gay bar that left one man hospitalized with a head injury.

The agency said Wednesday it started the internal affairs probe to review agents' actions and learn facts surrounding Chad Gibson’s injury.

He was in a TABC agent's custody when he was injured.

"We are saddened that this incident occurred and extend our sincere hope that Mr. Gibson recovers quickly," TABC Administrator Alan Steen said Wednesday.

"I have initiated an internal affairs investigation to answer questions about how these locations were chosen, to review the agents' actions, and specifically to establish the facts surrounding Mr. Gibson's injury."

Early Sunday morning, Fort Worth police officers and TABC agents went to The Rainbow Lounge and two other bars for what authorities call routine inspections.

More than a dozen people were arrested for public intoxication, but some Rainbow Lounge patrons have said authorities used excessive force, and they've denied claims that anyone groped or made lewd gestures toward officers.