Tokyo subway knife attack.

Tokyo, Japan – Tokyo police have arrested a man who brandished a knife and lit a fire on a train, injuring at least ten people on Sunday night.

Police said one of the injured, a man apparently in his 60s, was stabbed and is unconscious.

The Metropolitan Police Department stated the suspect, believed to be in his 20s, began attacking passengers on a Keio Line train near Kokuryo Station in the western Tokyo city of Chofu at around 8:00 p.m.

Investigators said the suspect also scattered what appeared to be oil, setting it on fire. They said the blaze burned some of the seating. The railway operator, Keio Corporation, said the conductor of the special express train bound for Shinjuku informed the company that a man on the train was wielding a knife.

The train made an emergency stop at Kokuryo Station, which the special express usually passes, to evacuate the passengers.

Twitter users posted videos and images of what appeared to be the train car where the incident occurred. A video posted shortly after 8:00 p.m. shows passengers running inside the train. Flames suddenly rise in the car they are fleeing.