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NBC New York – Police have received several tips and are following leads as they pursue the suspect who witnesses and law enforcement sources said pushed a man to his death on the subway tracks at 49th Street in Manhattan after an argument.

The man who fell on the tracks at the N, Q, R station at Seventh Avenue was hit by a southbound Q train at about 12:30 p.m. Monday. He was later pronounced dead at St. Luke’s Hospital.

Police have identified him as 58-year-old Ki-Suk Han of Elmhurst, Queens.

Witnesses told police the other man was mumbling to himself before he and Han began arguing on the platform.

A bystander recorded part of the fight between the two men and turned the video over to police, who released it to the public Monday night. The man who allegedly pushed Han is heard cursing and saying, in substance, “Leave me alone… stand in line, wait for the R train and that’s it.”

He then pushed Han onto the tracks, police said. Han tried to climb back up onto the platform but died after getting trapped between the train and the platform’s edge.

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