A US state alcohol board fired two agents and a supervisor, disciplined two other supervisors and changed several policies in the wake of a raid at a gay bar that left a customer seriously injured.

The Texas Alcoholic Beverage Commission said agent Christopher Aller and agent trainee Jason Chapman, who participated in the 28 June raid at the Rainbow Lounge, were fired. Their supervisor, sergeant Terry Parsons, was not at the Fort Worth bar that night but was also fired.

Aller and Chapman failed to report they used force when arresting the customer or that he was seriously injured, according to a report on the agency's investigation. They were also accused of participating in the raid without their supervisor's approval, disrupting the business during the raid and wearing improper attire, the report states.

Parsons failed to ensure the agents submitted a report on using force during the arrest, did not take appropriate action and did not notify supervisors that multiple arrests had been made that night, the report stated.

The commission said Parsons' direct supervisor, lieutenant Gene Anderson, would be suspended without pay for three days and be on probation for six months, and captain Robert Cloud, who oversees the Dallas and Fort Worth TABC offices, has received a written reprimand.