Police hunting a bus sex pest, who has targeted three young teenagers and a woman in west London, have released these CCTV images of the suspect.
Officers from the Metropolitan Police's Roads and Transport Policing Command are appealing for information after four sexual assaults in Hounslow and Ealing.
The first offence occurred on Tuesday, 10 March at about 8:00am when the victim, a 18-year-old girl, was on a route 120 bus between Northolt and Heston College.
The second offence occurred on Saturday, 9 May at about 11:20am when the victim, a 15-year-old girl, was on a Route 116 bus between Bedfont Green and Hounslow.
The third offence occurred on Saturday, 25 April at about 10:45am when the victim, a 17-year-old girl, was on a Route 607 bus between Bromyard Avenue and Uxbridge.
The fourth offence occurred on Monday, 11 May at about 10:45am when the victim, a 35-year-old woman, was on a Route 192 bus travelling to Hayes.
Officers are treating the incidents as linked and the suspect is described as an Asian man, aged between 40-55 years, between 5'3" and 5'9" in height, with dark brown / black hair and a moustache.
Anyone with information is urged to contact Detective Constable Emma Jones, who is leading the investigation on 0203 054 6181 or Crimestoppers anonymously on 0800 555 111.