Police have released CCTV footage following the sexual assault of a pregnant woman on a Birmingham bus.
The alleged attacker sat next to his 33-year-old victim and began rubbing her leg. As she got up to leave, he stood behind her and assaulted her again.
The woman got off the bus and was followed by the man before she approached security guards at Birmingham's New Street station for help.
The attack took place on the number 31 bus from Acocks Green to the city centre on May 20, between 9.30am and 10.25am.
Detective Constable Warren Moore, from Force CID, said: "This was an unprovoked assault against an unsuspecting, pregnant member of the public, who was visiting the area.
"The assault made her uncomfortable and unnerved and has had a lasting effect on her. She is unable to use buses through fear of this happening again."
The man is described as Asian, 5ft 6ins tall, of slim build with black hair and a small goatee beard.
He was wearing a grey jumper with black tracksuit bottoms and is believed to be in his 20s.
Anyone with information is asked to contact local police on 101 or Crimestoppers on 0800 555 111.