Police are appealing for help finding a woman in connection with a sexual assault at Euston Underground station in London.
Officers have released images of the woman, who they believe has information which may assist their investigation.
A man was travelling on an escalator at the station when a woman tried to link arms with him at around 9pm on Friday 14 April.
When he pulled his arm away she sexually assaulted him.
The woman, who was travelling with a friend, then left the escalator and boarded a Tube train.
A spokesperson for British Transport Police said: “Officers would like to speak to the woman in these images, as they believe she has information which may assist the investigation.”