SHANGHAI - A knife-wielding man has been apprehended by Shanghai police, after he attacked people at the Hechuan Road Station on the city's No 9 metro line on Wednesday morning, leaving three injured.

Police said the attack happened at 8:28 am at the subway station in Minhang district in the southwest part of Shanghai. The injured have been sent to hospital for medical treatment.

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The station was temporarily closed following the incident, and it has been reopened.

The suspect has been identified as a 54-year-old man surnamed Shen. The case is under police investigation.