The Houses of Parliament are pictured from the south bank of the River Thames in central London on November 1, 2017. A brawl broke out at the parliament's Sports and Social club on December 5, 2017 | Chris Ratcliffe/AFP via Getty Images UK parliament bar shut down after brawl Man hospitalized after fight in Sports and Social club.

A bar within the U.K.'s Houses of Parliament was closed indefinitely after a fight that left one man in hospital.

The Sports and Social club, popular with House of Commons researchers, was the scene of a brawl on Tuesday evening, although details only came to light on Wednesday.

According to a Times reporter, a 57-year-old man was arrested on suspicion of causing grievous bodily harm and affray, and a man in his sixties was taken to the hospital. The Sun reported that the victim had a glass smashed into his face.

The fight took place in an alleyway outside the bar, which is often used as a smoking area.

NEW: Parliament's sports and social bar shut indefinitely after brawl last night. Police were called at 6.30. 57 year old man arrested for GBH and affray. 64 year old man taken to hospital by ambulance. Understand they were Commons staff — Henry Zeffman (@hzeffman) December 6, 2017

A House of Lords spokesman told the Sun: “Following an incident on the Parliamentary Estate last night involving two parliamentary staff, after leaving the Sports and Social Club Bar, an investigation is underway and the bar will be temporarily closed until that investigation is complete.”