Police Probe Sex Attack Aboard Glasgow Bus
The 16-year-old got onto the vehicle at a bus stop near McDonalds on Jamaica Street, Glasgow, as did a man who had also been waiting at the stop.
He followed her to the back of the 7A bus and sat beside her, then sexually assaulted her.
Police said the young woman has been left extremely distressed by the ordeal.
They are appealing for information about the incident, which happened at around 4.30pm yesterday.
Detective Sergeant Alan Cuthbert said: I'm appealing to anyone who may have been on the bus and who may have noticed this man when he got on.
If you were a passenger on the bus and saw the man, please do contact us. Did you see where the man got off the bus? Any information could prove vital in helping us trace the man responsible for this assault which has left a young woman very upset.''
The suspect is described as black, around 6ft, in his late 40s to early 50s, with greying black hair.
He has no teeth.
Officers have been gathering CCTV images and are trying to trace passengers from the bus.