A 15-year-old girl was sexually assaulted after being approached by a group of drunk men.

An assault and sexual assault took place outside Sainsbury's in Market Place in Chipping Norton.

The victim was sitting on the steps outside the supermarket when she was approached by four or five drunk men.

The men had walked from the traffic lights towards Sainsbury’s and were described by Thames Valley Police as a very loud group.

One of the men approached the victim and kneed her in the back. A second offender then sexually assaulted the victim by touching her inappropriately over her clothes.

The first offender was a white man aged in his 40s, described as tall with a medium build and short greying hair.

He was wearing a black zipped up jacket and dark blue jeans with black shoes. During the incident he was speaking on an old Nokia handset phone.

The second offender was also a white man in his 40s, with a medium build and grey hair.

He was wearing a plain black top and denim jeans with white trainers. He was also carrying a light army green bomber jacket over his shoulders.

All of the other men in the group were white and aged in their 40s. One of the men had a large build with a goatee beard.

The victim did not require hospital treatment.

Investigating officer, PC Zoe Shuttleworth, based at Bicester police station, said: “We are conducting a detailed investigation in order to find these offenders.

“I would appeal to anyone who believes they have any information about the incident, no matter how insignificant you think it might be, to please contact police immediately.

"The easiest way to get in touch is by calling 101 or visiting your nearest police station and quoting the reference number for this investigation which is 43170232167."

The assault took place at around 9.45pm on Saturday, August 5.

Anyone with information, contact police on 101 quoting reference '43170232167', or contact Crimestoppers anonymously.