Authorities say the gang grabbed the man on the second-floor landing of his apartment building, put him in a choke hold and robbed him.
Police found surveillance video of the suspects at several locations near the May 3 robbery.
All three suspects are Hispanic. One is bald, and one walks with a cane.
The victim, Modesto Cotto, is a father with 15 grandchildren and great grandchildren who drove a city bus for 23 years without a single incident.
Anyone with information in regards to this robbery is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS.
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