The women were assaulted as they walked alone
Police have linked four sex attacks on women walking alone in west London.
The victims, aged 18 to 38, were assaulted in East Acton between January and March.
Officers are also asking for any women who may have been attacked in the area to come forward.
Detectives have issued CCTV images of a man they wish to speak to in connection with the incidents. He is described as white or Asian, aged between 20 and 32, 6ft tall, and of slim build.
At least two of the women were grabbed from behind
Timeline of attacks
3 January: An 18-year-old woman was walking along St Andrew's Road and listening to music with headphones in when a suspect grabbed her from behind. The victim struggled and the suspect fled the scene
25 January: A 27-year-old was walking along Hoylake Road while talking on her mobile when a man grabbed and assaulted her before running away
4 February: A 38-year-old woman was walking along Trinity Way when the suspect grabbed her and made suggestive comments before fleeing
9 March: A 24-year-old was walking from East Acton Tube station when she was approached by a man from behind and assaulted before her attacker fled the scene
