London, Nov 1 (ANI): Part of London's Underground came to a standstill for more than an hour on Halloween when a witch's hat was thrown on to the line at Chalk Farm, in North London.
A passenger is thought to have thrown the hat -containing metal- that cut out the power, halting four trains.
Hundreds of passengers were stuck on the trains in the early hours of Sunday morning before they were allowed to walk along tunnels to the nearest stations, London Underground said.
The four trains, three heading north between Camden and Belsize Park, and one northbound between Camden and Kentish Town, were stopped at 0040 BST.
"We apologise to passengers who were inconvenienced as a result of this incident, and would urge customers to exercise care and not to discard items on the railway," the Telegraph quoted a spokesman for the company as saying.
"The metal part of a hat thrown on to the rails at Chalk Farm caused power interruption," London Underground said.
London Underground estimated that there were up to 90 passengers on each train trapped for between an hour and an hour-and-a-half. (ANI)