The train on the Yamanote loop line, one of Tokyo's most used routes, was suspended due to "trouble on the train" at Akihabara station at around 1356 GMT Wednesday, East Japan Railway Company said on X formerly known as Twitter.

NHK said a report was made that a woman was wielding a knife on a train at Akihabara Station. The person believed to have been carrying the knife has been taken into custody, and the Metropolitan Police Department is investigating.

(Reporting by Satoshi SugiyamaEditing by Alexandra Hudson)