NEW YORK — A man who was shoved to his death in front of a subway train on Thursday night was a 46-year-old from India who lived in New York City and worked for a printing business, police said.
Investigators searched Friday for an unidentified woman who rose from a bench and suddenly pushed the man in the back with both hands, sending him flying onto the tracks as a train entered an elevated station in Queens.
Police released surveillance video of the woman fleeing the area and have been interviewing witnesses, including some who said she was mumbling and cursing to herself before the attack.
Some witnesses said the man had been shielding himself from the cold by waiting in a stairwell before he ventured out onto the platform to see if the train was coming. They also said he had no interaction with the woman, who immediately darted down the stairway after she pushed him.
One witness told police that the man had no time to try to save himself. The witness turned away to avoid seeing the man getting crushed on the tracks.
Investigators identified the victim, who lived alone in Queens, through a smartphone and a prescription pill bottle he was carrying. They delayed releasing his name while they worked to notify his relatives in India.
Detectives were following leads from the public generated by the video, and also checking area homeless shelters and psychiatric units in a bid to identify a suspect.
The woman was described as heavyset and in her 20s. It was unclear whether she and the man knew each other, or whether the attack was simply the act of a deranged stranger.
Commuters, meanwhile, absorbed the news of the second fatal subway shove in the city this month.
‘‘It’s just a really sad commentary on the world and on human beings, period,’’ said Howard Roth, who takes the subway daily.
He said the deadly push made him think about subway safety, ‘‘but I guess the best thing is what they tell you — don’t stand near the edge and keep your eyes open.’’
Asked about the episode at the station on Queens Boulevard in the Sunnyside neighborhood, Mayor Michael Bloomberg pointed Friday to legal and policy changes that led to the release of many mentally ill people from psychiatric institutions from the 1960s through 1990s.
‘‘The courts or the law have changed and said, no, you can’t do that unless they’re a danger to society; our laws protect you. That’s fair enough,’’ Bloomberg said on ‘‘The John Gambling Show with Mayor Mike’’ on WOR-AM.
There are no barriers separating the trains from the people on New York City’s subway platforms, and many people fall or jump to their deaths in front of rushing trains each year.
Though shoving deaths are rare, Thursday night’s killing was the second one this month. On Dec. 3, a 58-year-old man was pushed in front of a train in Times Square. A homeless man was charged with murder and is awaiting trial.
Other high-profile cases included the 1999 slaying of Kendra Webdale, an aspiring screenwriter, by a former psychiatric patient.
That case led to a state law allowing for more supervision of mentally ill people living outside institutions.