The BBC is investigating a claim that Russell Brand flashed a woman before laughing about it on his radio show.
The incident allegedly happened in 2008 when the woman was working in the same building as the broadcaster's office in Los Angeles, BBC News reported.
Minutes later, the comedian and actor is said to have laughed about it on air.
The woman, referred to as 'Olivia’, was reportedly left "stunned and disgusted" by the encounter.
In a statement, a BBC spokesperson said: "We’re very sorry to hear of these allegations and we will look into them.
"We are conducting a review to look at allegations of this nature and if the woman who has shared her story is willing to speak to us, we would be very keen to hear from her and anyone else who may have information.
"A key part of the review is to understand what complaints were made at the time, if there was knowledge of Russell Brand’s conduct while he worked on BBC radio, and what was done as a result.
"We will, of course, speak to the bureau team and anyone who was working there in 2008 as part of this.
"Further, the director-general has been very clear that some broadcasts from that period were, and are, inexcusable and totally unacceptable, and would never be aired today."
Mr Brand did not respond to a request for comment.
The 48-year-old has been accused of rape, assault and emotional abuse between 2006 and 2013, when he was at the height of his fame and working for the BBC and Channel 4 and starring in Hollywood films, following a joint investigation by The Times, The Sunday Times and Channel 4’s Dispatches programme.
He strongly denies the claims.
Channel 4 has also announced an investigation into the presenter’s time at its channels.
It also said it has removed all content featuring Mr Brand while the BBC said it has reviewed content and "made a considered decision to remove some of it, having assessed that it now falls below public expectations".
Both YouTube, which hosts his video channel, and podcasting platform Acast, where his Under The Skin podcast appears, have said he would not make money from advertisements on their sites and apps.
The remaining shows of Mr Brand's Bipolarisation tour have also been postponed, however, right-wing video platform Rumble has said the allegations against him have "nothing to do" with its platform.
The video hosting site also said that it stands for "different values" from YouTube and has "devoted ourselves to the vital cause of defending a free internet".
"We don’t agree with the behaviour of many Rumble creators, but we refuse to penalise them for actions that have nothing to do with our platform," the statement added.
Mr Brand’s last video to his platforms denied any criminal allegations and said he has been "promiscuous" but that all his relationships have been "consensual".
Team set up after Savile case works with police over allegations
A team set up after Jimmy Savile's abuse came to light is helping police looking into the rape and sexual assault allegations made against Russell Brand.
Earlier this week, police in London said they had received a report of an alleged sexual assault in the wake of the media claims.
Today, the Hydrant Programme - national experts on child sexual abuse inquiries - urged people to report any allegations to investigators.
In a statement, a spokesman for the programme said: "We are supporting the Metropolitan Police in their response to recent allegations and would urge any victim or survivor who feels ready to report any allegations of sexual assault to come forward and speak to officers."
Formerly Operation Hydrant, the group - which helps with policy and strategy - was established in 2014 in the wake of the Savile sexual abuse scandal.
Savile, believed to be one of Britain’s most prolific sex offenders, died aged 84 in October 2011.
An ITV documentary a year later revealed the details of his abuse.
The full extent of his crimes was revealed in Operation Yewtree’s report in 2013, which recorded 214 criminal offences committed by the radio DJ and Top Of The Pops presenter.
It is tasked with delivering the "national policing response, oversight, and co-ordination of non-recent child abuse investigations concerning persons of public prominence" and historical offences that took place in institutions.
Hydrant’s work was broadened last year to include the National Police Chiefs’ Council child protection and abuse investigation portfolio and is led by Deputy Chief Constable Ian Critchley.
