Detectives are hunting for a series of robbers and attackers across London's train network after a spate of violent incidents in recent weeks.
British Transport Police have issued five appeals for suspects this week as they probe reports of crimes such as sexual assaults, bicycle theft and wallet robbery.
Recent incidents in the capital have seen robbers try to grab shopping bags or handbags, or leave people with lasting injuries following violent incidents.
It comes after commuters were accused of assaulting a man who dropped his trousers on a District line train near Upton Park in East London on August 7.
BTP have interviewed two of the four vigilantes so far, while the man - who told them to 'f*** off' after requests to pull up his pants - was taken to hospital and sectioned under the Mental Health Act. No arrests have been made and the probe continues.
