The incidents happened in front of 1500 President Street, in front of 1507 President Street, near Montgomery Street and Albany Avenue, at the corner of St. John's Place and Utica Avenue and in front of 1441 St. John's Place.
The victims were being 15 and 35 years old. The bandits made off with an undetermined amount of cash and personal property. Investigators said the robbers pushed one victim, but no injuries were reported in any of the crimes.
There is surveillance video and a sketch of one of the robbers, who are said to be in their late teens or early 20s.
Last Wednesday, police say they struck again, unsuccessfully trying to force their way into a woman's home at Montgomery Street and Kingston Avenue.
Anyone with information regarding any of these incidents is asked to call the New York City Police Department's Crime Stoppers Hotline at 1-800-577-TIPS.