A woman has been sexually assaulted by a man as she slept on a train.

The attack happened on the 10.28pm service from East Kilbride to Glasgow Central on Saturday.

The woman was sleeping while a man kissed and touched her inappropriately before sexually assaulting her.

The woman got off the train at Glasgow Central and was helped by a group of passengers towards a connecting train.

The attacker is white, in his 20s, 5ft 10in and slim.

He has dark hair and was wearing a blue Stone Island top, black jeans and dark Adidas trainers.

A British Transport Police spokesman said: "The woman had been asleep on the train prior to the assault and it may not have been apparent to other passengers that she was being assaulted."

Anyone with information is asked to text 61016 or call 0800 40 50 40.