Police in East Lothian are investigating an incident of sexual assault involving a 17 year-old woman travelling on the 107 East Coast Bus from Haddington to Dunbar.

She boarded the bus at Market Street Haddington at 6.30pm on Wednesday 14 December 2016. She was then assaulted by a male passenger who eventually moved to the front of the bus and got off at Mill Wynd East Linton.

The suspect is described as a white man in his early to mid 40’s.  He has a slim build and was described as quite muscular with short cropped grey/brown hair.

He was seen to be wearing a grey hooded top with loose jeans.  He was also carrying a dark blue bag.

Police Sergeant David Aitchison of Haddington Police Station said:  “This was a very upsetting ordeal for the 17-year-old victim and it is important that we trace the man responsible as soon as possible.

“I would urge anyone who was on the number 107 East Coast bus on Wednesday, December 14, and remembers this incident, or recognises the suspect description, to get in touch with us immediately.”

Those with information can contact Police Scotland on 101 or anonymously through Crimestoppers on 0800 555 111.