Image source, ReutersImage caption, Rescue workers and police officers rushed to the scene of the attack at the Kokuryo station

A man has been left in critical condition after a knife and arson attack at a major train line in the Japanese capital, Tokyo.

At least 10 others were also injured in the incident, which happened at around 20:00 (11:00 GMT) at Kokuryo station, in the city's western suburbs.

The suspected attacker, a man in his 20s, was arrested at the scene.

A video shared by broadcaster NHK showed people running from a train as smoke and flames filled the carriage.

Despite Japan being one of the safest countries in the world, there have been a number of knife attacks in recent years.

Two separate incidents took place in August at Tokyo train stations, leaving several people injured.

In 2019, a man also attacked a group of schoolchildren waiting for a bus in Kawasaki. Two people were killed and at least 18 were injured.