NEW YORK – A woman sought in the death of a man who was shoved in front of a subway train was picked up by police Saturday after a passer-by noticed her on the street and called authorities.

The woman, whose name was not released, was being questioned and had not been formally charged, New York Police Department spokesman Paul Browne said. Investigators were arranging for witnesses to identify the 31-year-old woman in custody as the person who pushed Sunano Sen to his death Thursday night.

The 46-year-old Sen, who was from India, ran a printing shop and was living in Queens. He died after a woman muttering to herself suddenly lunged forward and pushed him off an elevated platform and onto the tracks of the No. 7 train, which connects Manhattan and Queens.