Police are searching for a man who masturbated in front of a woman and a child on the District line. 

The incident took place on the Tube between Monument and Stepney Green between 7.30pm and 7.50pm on Saturday, January 13. 

British Transport Police said that the man began masturbating in front of a woman who was travelling with a child. 

When she got off the train at Stepney Green, he followed her. 

British Transport Police detectives investigating have released an image in connection with the incident. 

This Is Local London: Police have urged anyone who recognises this man to get in touchPolice have urged anyone who recognises this man to get in touch (Image: BTP)A spokesperson for the force said: “If you recognise the man in the image or have any information about the incident please contact officers by texting 61016, or by calling 0800 40 50 40 quoting reference 604 of 13 January. 

 “Information can also be given anonymously to Crimestoppers on 0800 555 111.”