New York City police are questioning a suspect in connection with the death of a man who was allegedly pushed onto subway tracks, officials have said.
Ki Suk Han of Queens was killed on Monday after allegedly being shoved at the Times Square subway station.
He tried to get back onto the platform, but was trapped between a train and the platform. He died at a nearby hospital shortly after.
New York Police Department spokesman Paul Browne said investigators recovered security video showing a man fitting the description of his alleged assailant working with street vendors near the Rockefeller Center.
Police went there and took him into custody.
Meanwhile, the publication of a photograph taken as Mr Han was about to be struck by the train has triggered a public backlash.
The picture, published on the front page of the New York Post on Tuesday under the headline "Doomed", showed Mr Han, 58, struggling to climb back onto the platform.
It has prompted questions about why nobody, including the photographer, seemingly tried to help the man.
The image shows the train approaching, with the caption: "Pushed on the subway track, this man is about to die."
Freelance photographer R. Umar Abbasi said he used his camera to try to warn the approaching train's driver.
He said: "I just started running, running, hoping that the driver could see my flash."
But many readers commenting on the Post's story questioned that explanation.
One reader, Mark Kevin Herring, asked: "How is a flash from a camera going to warn a train operator that a passenger is on the track?"
Readers also speculated that anyone trying to rescue Mr Han would have risked being pulled onto the tracks.
Dozens of people are reported to have witnessed the tragedy from the subway platform at around 12.30pm on Monday at 49th Street and Seventh Avenue.
Patrick Gomez, who was in the station, said he heard a "thud that didn't sound normal" when the train pulled into the station.
He added that people started screaming and running and police quickly evacuated the platform
The Post reported that the victim's wife had argued with her husband before it happened.
She said she tried to call him after their fight that morning, but he never picked up.