Moment vigilante tube passengers 'stop' man who pulled down trousers on train

Commuters who took the law into their own hands when a Tube passenger dropped his trousers in a packed Tube carriage with children present could face arrest, the Daily Mail can reveal today.British Transport Police (BTP) believe the naked man, who has since been detained under the mental health act, was assaulted on the District line in east London .Up to four men stepped in when he repeatedly refused to pull up his pants at 3.30pm last Thursday. He was pinned to the floor and carried off the train before being arrested by an off duty police officer.But detectives are probing whether the vigilantes committed any criminal offences after he refused to pull up his pants.BTP has appealed for witnesses to the incident but there have been no arrests over the brawl that started when the naked man refused to cover up.