Paul Gambaccini, the gay BBC TV and radio presenter, has been arrested on suspicion of sexual offences under Operation Yewtree.
The DJ was held at his home in south London on Tuesday morning and answered questions in police custody before being released on bail.
Yewtree has been investigating claims of historical sexual offences since the Jimmy Savile scandal broke in 2012.
Mr Gambaccini was arrested under the “others” strand of the investigation, meaning the allegations are not directly linked to Savile.
The 64-year-old, who is one of Britain’s best known broadcasters and foremost authorities on music, becomes the 15th arrest under Operation Yewtree since it began a year ago.
Mr Gambaccini entered into a civil partnership with his partner Christopher Sherwood last year.
There has been no response from the BBC but a statement is expected later.
Comments on this story are disabled for legal reasons.