17 people injured after knife attack on Tokyo train by man dressed as the Joker

The attacker, identified by police as 24-year-old Kyota Hattori, was arrested on the spot after Sunday’s attack and is being investigated on suspicion of attempted murder

Emergency workers attend the scene (Kyodo News via AP)

At least 17 people were injured after a man dressed in a Joker costume and brandishing a knife stabbed at least one passenger on a Tokyo commuter train before starting a fire.

The incident sparked a panic, with people scrambling to escape and jumping from windows, according to police and witnesses.