An e-fit has been released by police investigating the rape of a 24-year-old woman by two men in woodland in Chelmsford, Essex.
The attack happened shortly after 2300 BST on Friday when the woman was sexually assaulted near a nature reserve in Central Park.
The victim, who was left badly traumatised, had been walking along a footpath when she was attacked.
The attack ended when they were disturbed by passers-by.
Essex Police have issued an e-fit of one of the attackers.
Investigating officer, Det Insp Barry Wix, said: "This was a serious attack on a defenceless young woman.
"I would urge anyone who can help identify these two men from the descriptions provided to contact us.
"Furthermore, I would also like to hear from those women who were walking along the cycle path."
Both assailants are described as white, in their mid-late 20s, approximately 5ft 8in (1.73m) tall; one had short dark hair, the other slightly longer dark hair, both of medium build and were wearing jeans and white trainers.
One man was wearing a black t-shirt and was sporting distinctive chunky diamond earrings in both ears while his accomplice was wearing a white, checked shirt.
Anyone with information in connection with the rape is asked to contact Essex Police.