Conservative MP Crispin Blunt has named himself as the member of parliament arrested on suspicion of rape and possession of controlled substances.
Surrey Police had said a man was arrested on Wednesday before being released on conditional bail.
On Thursday afternoon, The Sun first reported the arrest and The Guardian reported it had confirmed the man is a sitting MP.
Soon after the reporting, Blunt, the MP for Reigate, published a statement on X, formerly known as Twitter, confirming he had been arrested.
The Conservative politician said the arrest was “unnecessary” and he is “confident” investigation will end without charge.
The statement said: “It has been reported that an MP was arrested yesterday in connection with an allegation of rape.
“I am confirming that MP was me. The fact of the arrest requires a formal notification of the speaker and then my chief whip.
“I have now been interviewed twice in connection with this incident, the first time three weeks ago, when I initially reported my concern over extortion. The second time was earlier this morning under caution following arrest.
“The arrest was unnecessary as I remain ready to co-operate fully with the investigation that I am confident will end without charge.
“I do not intend to say anything further on this matter until the police have completed their inquiries.”
A police spokesperson said: “We can confirm a man was arrested yesterday morning (October 25) on suspicion of rape and possession of controlled substances.
“He has been released on conditional police bail pending further inquiries.”
It is the latest in a string of arrests of sitting MPs.
In May 2022, it was revealed that a Conservative MP, who was not named for legal reasons, had been arrested on suspicion of rape and sexual assault. They have not been charged.
Three years ago, ex-Conservative MP Charlie Elphicke was jailed for two years for sexually assaulting two women.
Last year, former Tory MP Imran Ahmad Khan was jailed for 18 months for sexually assaulting a 15-year-old boy.