A 15-year-old boy has been left in a critical condition in hospital after he was gang raped by three men and two older teenagers at a party in Kentucky.

The boy’s attackers allegedly filmed his assault on a mobile phone before distributing it to other mobile phones, police said. The authorities do not know if the footage was distributed online.

Tyler Perry, 19, Dayton Ross Jones, 20, and Samuel Miller, 18, have been charged with serious sexual assault, promoting sexual performance by a minor and use of a minor in a sexual performance.

All three are being held on a $1 million (£621,450) each.

Two 17-year-olds have also been accused of assaulting the boy last Sunday at a party in Hopkinsville, about 75 miles northwest of Nashville.

Hopkinsville Christian County Jail said the two 17-year-olds are being processed separately.

The boy is still in Clarksville hospital but is improving, Chris Miller, spokesman for the Christian County Sheriff’s Office, said.

Both Jones and Miller face further charges of distribution of matter portraying a sexual performance by a minor, while Perry has been charged with tampering physical evidence.