New York subway death: Man pushed off platform in 'unprovoked' attack

Wai Kuen Kwok was targeted by an unknown assailant while standing with his wife on the platform

Police are seeking this man in connection with the death (YouTube )

A man has been pushed to his death beneath a train on the New York subway.

Police said an unidentified man pushed 61-year-old Wai Kuen Kwok onto the tracks and into the path of an oncoming train on Sunday morning.

Kwok, who had been standing on the platform with his wife, was struck by a southbound train at around 8.40am at the 167th Street and Grand Concourse station. He was pronounced dead at the scene. His wife was not injured.

The assailant fled but authorities have released video footage of a man wanted in connection with the horrific incident.

There was no indication that Kwok knew the man or had had an altercation with him before he was pushed, police said. Witnesses said they believed the man fled the subway station after shoving Kwok and jumped on a city bus.

There have been three other incidents in recent years that have involved a person being pushed onto the tracks.

In April 2013, a train ran over a man desperately clawing at a Manhattan subway platform after being pushed onto the tracks by a homeless suspect with whom he'd been arguing.

In December 2012, another homeless man was arrested for pushing a Queens man in front of a Times Square train that fatally crushed him.

And later the same month, a mumbling woman pushed a man to his death in front of a subway train in Queens.

Video courtesy of the AP.