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A person has died after being shoved in front of a moving subway train at Times Square station in New York City, police say.

A woman, who is believed to have pushed the victim under the No. 1 line train that was travelling southbound, has been taken into custody.

It is not clear if the two knew each other.

According to the , they were seen arguing before the incident that took place at lunchtime.

Some reports say the victim was a woman.

Witnesses , two other women may have been involved.

Police and fire-fighters are investigating and there are delays on southbound 1, 2 and 3 trains.

Security has been stepped up in New York for Tuesday's presidential vote as both the main candidates are holding election night events in the city.

The candidates have been racing across battleground states on the campaign's final day.