Police area appealing for help after they handcuffed man in the women's toilets of a train station and he then escaped.
Officers were called just after 9am on Saturday after the man was spotted in the women's toilets at Liverpool Street station.
They found and handcuffed him but he then escaped.
Police the man is not a danger to the public but are "concerned for the man's welfare".
They say they are reviewing the CCTV at the station to try to locate him.
The man is described as white, around 5ft 7ins, of a medium build and with short brown hair and was wearing blue clothing.