Japanese police have arrested a man after a knife attack outside a train station that left at least 13 people injured.

日本警方逮捕一名男子，该男子在某火车站外侧持刀行凶，造成至少1人受伤。

The man boarded two buses and attacked passengers - who were predominantly（主要地） school children - in the city of Toride, some 40km (25 miles) north-east of Tokyo, reports say.

Four people were stabbed（刺伤） , and others were injured as they fled, police say.

The 27-year-old man has been arrested on suspicion of attempted murder.

One of the victims would need to remain in hospital for several weeks, while the others were not seriously injured, said a spokesman¹ for the local fire department.

Correspondents² say the attack has brought back memories of an incident in central Tokyo in 2008, in which a man armed with a knife killed seven people.