PA MediaIan Huntley is serving a life sentence for the murders of the two schoolgirlsSoham murderer Ian Huntley is close to death after having been taken off life support following an attack in prison, the BBC understands.The 52-year-old has been in hospital since 26 February after being battered over the head with a makeshift weapon at HMP Frankland in County Durham. The high security jail houses some of the most violent inmates.Prison sources said Huntley was found lying in a pool of blood after the attack. He suffered significant head trauma from his injuries.Huntley was convicted of murdering 10-year-old schoolgirls Jessica Chapman and Holly Wells in Soham in 2002.A school caretaker in the Cambridgeshire commuter town, Huntley committed one of the most shocking child murders of the century.Holly Wells and Jessica Chapman had been at a family barbecue in August 2002. It's believed they were on their way to buy sweets when Huntley, then aged 28, lured them back to his home and killed them.The BBC understands that triple killer Anthony Russell, 43, is suspected of attacking Huntley.Having been kept on life support in hospital, it was turned off on Friday, according to prison sources. This was not the first time he had been attacked at HMP Frankland. In 2010, he was slashed across the throat and needed 21 stitches. The prison is nicknamed monster mansion due to its extreme levels of violence. It houses some of the most dangerous criminals including murderers and rapists.Huntley was also attacked in 2005 by a convicted murderer who chucked boiling water over him at HMP Wakefield.PA MediaHolly Wells (left) and Jessica Chapman went missing on 4 August 2002 in Soham, CambridgeshireThe photo of the girls he killed – in their red Manchester United football kits – is etched in the minds of many who vividly remember their disappearance and murder.It was taken by Holly's mum Nicola just an hour and a half before they were last seen. It dominated news reports at the time as a nationwide search for them took place.About 400 officers worked full-time on the case. Hundreds more volunteers joined the search but nearly a fortnight after they disappeared, the girls' bodies were found in a ditch in Suffolk.Huntley was arrested the same day. He was subsequently convicted and sentenced to a minimum of 40 years for the double murders, with the judge saying "in your lies and manipulation up to this very day, you have increased the suffering you have caused the two families".His girlfriend Maxine Carr was also jailed in 2003 after being found guilty of conspiring to pervert the course of justice for giving him a false alibi. She has since been released.Soham murderer Ian Huntley seriously injured in prison attackWho is Soham killer Ian Huntley?'Interviewing Ian Huntley troubled me, so I called police'SohamCambridgeshire