Labour MP Dan Norris has been arrested on suspicion of rape and child sex offences.
A Labour Party spokesperson said: “Dan Norris MP was immediately suspended by the Labour Party upon being informed of his arrest.
“We cannot comment further while the police investigation is ongoing.”
Police said a man in his 60s had been arrested on Friday on suspicion of sexual offences against a girl, rape, child abduction and misconduct in a public office.
Sky News has contacted Mr Norris for comment.
Mr Norris, 65, defeated Jacob Rees-Mogg to win the new seat of North East Somerset and Hanham in last year’s general election.
He has also lost the party whip in the House of Commons and has stepped down from his role as chair of the League Against Cruel Sports.
Avon and Somerset Police said in a statement: “In December 2024, we received a referral from another police force relating to alleged non-recent child sex offences having been committed against a girl.
“Most of the offences are alleged to have occurred in the 2000s, but we’re also investigating an alleged offence of rape from the 2020s.
“An investigation, led by officers within Operation Bluestone, our dedicated rape and serious sexual assault investigation team, remains ongoing and at an early stage.
“The victim is being supported and given access to any specialist help or support she needs.
“A man, aged in his 60s, was arrested on Friday (April 4) on suspicion of sexual offences against a girl (under the Sexual Offences Act 1956), rape (under the Sexual Offences Act 2003), child abduction and misconduct in a public office. He’s been released on conditional bail for enquiries to continue.
“This is an active and sensitive investigation, so we’d respectfully ask people not to speculate on the circumstances so our enquiries can continue unhindered.”
Mr Norris first entered Parliament when Tony Blair came to power in 1997 and served as the Wansdyke MP until 2010.
He was an assistant whip under Mr Blair and served as a junior minister under Gordon Brown.
Mr Norris has also been West of England mayor since 2021 but is due to step down ahead of May’s local elections.
A spokesman for the League Against Cruel Sports, a UK-based animal welfare charity which campaigns to end sports such as fox hunting and game bird shooting, confirmed he had stepped down from his role.
“The charity cannot comment further while an investigation is ongoing,” a statement said.