Japanese man dressed as the Joker goes on stabbing rampage in Tokyo Metro

The perpetrator, described as a man in his 20s, boarded the train wearing a green shirt, and indigo suit according to witnesses. Footage published by Japanese national broadcaster NHK shows panicked passengers running down train cars as they filmed with flame and smoke. Dozens of firefighters and police officers were seen working outside the station.

"At first I thought it was something like a Halloween event. But I rushed away as a man carrying a long knife came in. I was very fortunate not to be injured," a man who was on the train told NHK.