Urfan Sharif is said to have been ambushed by two inmate at HMP Belmarsh on New Year’s Day (January 1).
According to The Sun, the 43-year-old has had cuts to his neck and face and is receiving medical treatment in the prison.
A spokesman for the Metropolitan Police said officers are probing “an allegation that a prisoner was assaulted at Belmarsh”, adding that “the 43-year-old suffered non life-threatening injuries”.
The Prison Service says that it is investigating reports of an assault at this time.
Sharif and Sara’s stepmother, Beinash Batool, were jailed for life in December for years of horrific “torture” and “despicable” abuse that culminated in the 10-year-old’s murder.
The court heard that she suffered “unimaginable pain, misery and anxiety” as she was repeatedly beaten, burned, bitten and restrained at the family home in Woking, Surrey.
Sharif was handed a minimum term of 40 years and Batool was given 33 years.
Sara’s uncle, Faisal Malik, 29, who was found guilty of causing or allowing her death, was jailed for 16 years.
In a televised sentencing at the Old Bailey, Mr Justice Cavanagh said Sara’s death “was the culmination of years of neglect, frequent assaults and what can only be described as torture”, mainly at the hands of Sharif.
The senior judge said her “despicable treatment” took place in “plain sight and in front of the rest of the family”.
He told Sharif: “You treated her in such a way because you considered it your right to impose harsh discipline on her.
“Sara was a brave, feisty and spirited child. She was not submissive as you wanted her to be. She stood up to you.
“I have no doubt that your ego and sense of self importance was boosted by the power you wielded over her and the rest of the family.”
A Prison Service spokesperson said: “Police are investigating an assault on a prisoner at HMP Belmarsh on January 1.
“It would be inappropriate to comment further while they investigate.”