Police are investigating a sexual assault in which a woman was attacked in her own home in the early hours of the morning.

A man, unknown to the victim, entered a house on a street south of the Dinsdale shopping centre in Hamilton about 1.45am on Saturday 1 September, says Detective Senior Sergeant Mark Greene.

"He has then sexually assaulted the victim as she was asleep in her bed. The man has then run from the address.

"Attending officers, with the assistance of a police dog unit, were unable to locate the man."

The offender is described as wearing a white or tan-coloured t-shirt, about 6 foot tall, with wide shoulders, and wearing a beanie.

It's possible he may have had a bicycle, says Mark.

"This was a frightening experience for the victim, who is being supported by police."

Anyone who may have seen anything or anyone unusual in the Dinsdale area in the early hours of Saturday, or has information which may help us, is asked to contact Hamilton Police on (07) 858 6200.

Alternatively, information may be left anonymously via the Crimestoppers 0800 555 111 line.