Tokyo Subway

At least 17 injured in Tokyo subway knife and arson attack

Video footage shows passengers running through carriages away from flames and clambering out of train windows.

The incident happened at around 20:00 local time (11:00 GMT) near Kokuryo station, in the city's western suburbs.

Police say a man in his 20s was arrested at the scene. Local reports suggest he was in a Halloween costume.

Eyewitness reports and footage appears to show a suspect in a bright purple and green suit, similar to the Joker character from the Batman comics.