A 61-year-old man standing on a subway platform with his wife was pushed into the path of an oncoming subway train and killed Sunday in the Bronx in an apparently unprovoked attack, officials said.
The engineer on the southbound D train saw Wai Kuen Kwok on the tracks at the 167th Street station shortly before 9 a.m., police said. The conductor tried to stop the train, but it was too late, and the man was hit, police said.
The suspect may also have tried to push the victim's wife onto the tracks, police said. She was taken to the hospital for evaluation but was not hurt. The wife has since been released and has spoken to police.
There was no indication that Kwok knew the man who pushed him or had an altercation with him, police said. Witnesses told police they believe the man left the subway station and jumped on a city bus.
Police released surveillance video showing a man in a dark jacket stepping off a bus and walking into a store. The man emerges moments later smoking a cigarette and strolls away.
Police said the man is wanted for questioning in connection with Kwok's death.
Anyone with information about the man is asked to call Crime Stoppers at 800-577-TIPS.
Tracie Strahan contributed to this report.