ITV News understands that Michael Adebolajo, one of the men accused of the murder of Drummer Lee Rigby in Woolwich, has been assaulted in prison. The prison service have confirmed an investigation is underway.
A source told ITV News that Adebolajo had two teeth knocked out and that he had been "targeted" within the prison.
A Prison Service spokesperson said: "The police are investing an incident that took place at HMP Belmarsh on July 17. It would be inappropriate to comment while the investigation was ongoing.”
More top news
The former royal marine could be released in as little as two weeks after his sentence was reduced from murder to manslaughter.
The painting of the late singer was auctioned to help raise funds for HIV and Aids prevention and awareness.
Katie Hopkins has accused JK Rowling of living in a "fantasy land" as the two clashed in the aftermath of the Westminster terror attack.