POLICE in Barnsley  have made a fresh appeal for information into an alleged sexual assault after DNA evidence has been revealed.

The alleged attack - which took place on Sunday, 15 May 2011 at around 2am - happened to a woman in her early 20s, who was walking along Wath Road on to Ingsfield Lane, in Bolton-upon-Dearne. She was grabbed and pushed into the Mansion Fields Park area and sexually assaulted.

Police are now re-appealing for information as - althought the identity of the believed offender is currently unknown -they now have DNA evidence.

It is believed during the attack, the woman put up a struggle and is believed to have bent the offender’s finger and bit him on the left cheek. Her attacker is described as a white male, in his early 20s, and of a muscular build with short dark hair.

Police would like to appeal for witnesses or to anyone who may have noticed a friend or partner with a facial bite mark and, or injuries to his finger.

It is thought the woman alerted a passing witness on a bike, who then accompanied her back home. Officers would like to trace this male, as he may be able to help the investigation.

The male witness is described as being white, around the age of 17 years old, with blond curtain style hair.

Police would like to encourage anyone who may have information, or was a witness to contact South Yorkshire Police on 0114 2202020 ask for Barnsley intelligence and quote BX number: BX / 69 /2011.