Falkirk MP Eric Joyce has been arrested after an alleged fight in a House of Commons bar.
Police were called to the Sports and Social Club around 10.30 p.m. following reports of a disturbance.
Joyce (52) resigned from the Labour Party last year following a fracas in a Commons bar when he headbutted Tory MP Stuart Andrew and assaulted three others.
He now sits in parliament as an independent.
In a statement on Thursday night, a Metropolitan police spokesman said: “Police were called shortly before 10.30 p.m. this evening to reports of a disturbance at a bar within the House of Commons.
“Officers attended and a man aged in his 50s was arrested in connection with this incident. He remains in custody and inquiries continue.”
Following the incident in February last year, the former Army major appeared at Westminster Magistrates Court to plead guilty to four counts of common assault.
He was fined £3000 and given a three month pub ban and a 12 month community order after the brawl in the Strangers’ Bar.
After the sentencing, he admitted that he was lucky to avoid jail and apologised to the House of Commons.
He later announced that he would not be seeking re-election in 2015.