Michael Adebolajo, one of two men accused of killing British soldier Lee Rigby in a London street, has been attacked in prison, reports say.
According to the BBC, it is thought Adebolajo lost two of teeth in the attack, in Belmarsh Prison on Wednesday (Thursday, NZT).
Adebolajo, 28, has been accused of hacking the Rigby to death together with Michael Adebowale, 22, near Woolwich Barracks in south east London on May 22.
The trial for the pair is expected to start November 18 at the Old Bailey.
The British Minister for Justice confirmed there was an attack, but would not go into further detail, the Daily Mail reported.
No arrests have been made.
More than 800 mourners gathered at Rigby's funeral last week.
British Prime Minister David Cameron attended the funeral with London Mayor Boris Johnson. He said the whole country would be mourning with Rigby's family.
The 45-minute service began with a two-minute silence in honour of the soldier, who served in the 2nd Battalion Royal Regiment of Fusiliers.
In the days after his murder, thousands paid tribute by laying flowers and messages at the site of his death.