Surveillance video shows the four people surrounding the man on December 28 around 7:30 p.m. on University Avenue in Morris Heights.
Police say they punched him in the head before stealing a bag of food.
No arrests have been made.
Anyone with information in regard to the identity of these individuals is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782).
----------
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube