A teenage girl was left bruised after being sexually assaulted on a bus.

It happened between 3.30pm and 5pm on August 19, when a man sat next to the girl on the number six bus between Fishermead, central Milton Keynes and Heelands and placed his hand on her leg.

She then moved to a different seat but the man followed her.

As she stood up to get off the bus, he grabbed her arm, causing her to fall on other passengers.

He inappropriately touched the girl over her clothing before she got off in Heelands.

She suffered bruising to her arm where she was grabbed but did not require hospital treatment.

The offender is described as a mixed race man, approximately 30-years-old, around 6ft tall, of skinny-medium build, with black straight hair with short back and sides and a small moustache.

He was wearing a cream thobe with orange patterns.

PC Joe Garvey, based at Milton Keynes police station, said: “I am appealing for any witnesses to this incident to please come forward.

“To contact us, call 101 or make a report on our website, quoting reference number 43220372243.

“Alternatively, you can provide information anonymously to independent charity Crimestoppers by calling 0800 555 111 or via its website.”