New York City police on Friday were searching for a woman who witnesses say sent a man to his death by pushing him into the path of an oncoming subway train in Queens.

Police surveillance video recorded shortly after the Thursday night incident shows a heavyset woman  running through an intersection near the station's platform.

The death marks the second time this month that a commuter was killed after being pushed onto New York subway tracks.

The incident occurred just after 8 p.m., when a man waiting for the No. 7 elevated train was pushed from behind by a woman who was said to have been mumbling to herself, police said.

“Witnesses said she was walking back and forth on the platform, talking to herself, before taking a seat alone on a wooden bench near the north end of the platform,” Paul J. Browne, NYPD deputy commissioner, said in a statement. “When the train pulled into the station, the suspect rose from the bench and pushed the man, who was standing with his back to her, onto the tracks into the path of the train. The victim appeared not to notice her, according to witnesses.”

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