A 14-year-old girl has been seriously sexually assaulted in Birmingham city centre.
The attack happened at the back of the Pavilions Shopping Centre at about 2200 BST on Friday.
The girl had just got off the number 50 bus when she was dragged behind the building where the assault happened.
Police believe the offender was a passenger on the same bus, which was travelling from Moseley to the city centre.
Detectives want to speak to man described as black, about 20-years-old, and who was wearing a blue and black zip up jacket.
Detective Sergeant Phil Asquith also appealed for witnesses to the assault, adding that the area was "fairly busy" at the time.