London - The strange case of Shia LaBeouf keeps getting stranger. The actor is crying rape by a woman and two artists are corroborating his account.

The 28-year-old Transformers star has been in the news in the past year for his erratic behaviour, after he was accused of plagiarising a Daniel Clowes graphic novel for his 2012 short film Howard Cantor.com. In February, for a one-man art piece titled #IAmSorry, he invited members of the public to visit him alone with a prop of their choice in Los Angeles' Cohen Gallery, where he sat with a paper bag on his head that read "I Am Not Famous Anymore".

In an interview with Dazed magazine that was released last Friday - a face-to-face meeting in London where he kept silent but texted the interviewer - he said he was raped by a woman during that performance.

He wrote: "One woman who came with her boyfriend, who was outside the door when this happened, whipped my legs for ten minutes and then stripped my clothing and proceeded to rape me."

On Twitter on Sunday, his collaborators, British artist Luke Turner and Finnish artist Nastja Sade Ronkko, confirmed his story, said The Guardian website.

They said in a statement: "As soon as we were aware of the incident starting to occur, we put a stop to it and ensured that the woman left."

They also clarified that nowhere did they state "that people could do whatever they wanted to Shia".

They did not say if the incident was reported to the police, but Turner disclosed more details after journalist Piers Morgan asked him on Twitter why they had let "Shia LaBeouf's 'rapist' walk away", said The Guardian.

Turner said on Twitter: "It wasn't clear at the time precisely what had happened, & the 1st priority was to ensure everybody's safety in the gallery. She ran out, rather than simply walking away. Beyond that, it's not my place to comment."

The performance was one of a series of bizarre apologies LaBeouf made for his short film. He posted apologies on Twitter, which turned out to be have been plagiarised too. He hired a skywriting plane to inscribe an apology to Clowes.

Days before his five-day performance at Cohen Gallery, he also wore a paper bag on his head when he attended the premiere of his movie Nymphomaniac Volume I at the Berlin Film Festival.