Police in Bucks County are asking for help identifying four men involved in a pre-Christmas bar fight that was captured on video.

On Tuesday, Bensalem police released surveillance footage of the Dec. 20 brawl at Big Heads Bar in a post on the department's website titled "Great video. Let's ID these hooligans."

The fight broke out around 10 p.m. at the Street Road watering hole, police said, when a male customer got into a dispute with a bartender and later threw a punch at him. The released video captures the customer gesturing angrily over the bar, but not throwing the punch.

As bar employees tried to throw the man and his three friends out of the bar, a fight ensued, police said.

One of the men used a bottle to strike an employee, causing a serious laceration to the employee's head, police said, while another began swinging a pool cue. The injured employee was treated at a hospital for his head injury, police said.

The men were accompanied at times by a woman, who is seen on the surveillance tape. Police said she was not involved in the altercation but clearly knew the men involved.

Police are looking for all four men. Police say they left in two older-model, gray four-door cars.

Authorities have asked anyone with information to call Bensalem police at 215-633-3719 or leave a tip on the department's website.