A girl was sexually assaulted by a man in a car park, police say.

It was reported that between 5pm and 5.30pm on December 5, the 15-year-old was assaulted over her clothing.

The alleged incident happened in a car park of a building at the end of Market Street, near the junction with Blenheim Road and Southampton Road.

Officers say the man left the scene after members of the public passed the area.

Now, officers are appealing for information or any witnesses to come forward.

READ MORE: Man admits causing fatal crash after death of lorry driver

The male was described as black, about 18 years old, about 5ft 6in tall, slim build.

He had black braided hair and was wearing a black durag, black tracksuit and black trainers.

He was carrying a black rucksack and had tattoos on both of his forearms.

Police are currently conducting numerous enquiries, including with CCTV footage in the area, to identify and locate this male.

If you have any information about this incident, please call 101 quoting reference 44240531391.