The first robbery happened on Thursday November 24th at 10 p.m. on Madison Avenue at 70th Street.
The suspect, armed with a handgun, approached a 47-year-old woman and demanded her iPhone.
Just days later, on Saturday November 26th at 7:10 p.m. at 930 Madison Avenue, the suspect demanded a 36-year-old man handover his iPhone at gunpoint.
The following Saturday, on December 3rd at 12:05 a.m. at 154 East 70th Street, a 22-year-old woman was robbed at gunpoint for her iPhone.
There were no injuries in any of the incidents. A second suspect was also noticed on the scenes of the crimes acting as a lookout.
The robbery suspect is described as a Hispanic man approximately 20 years old, 5'10" tall and 170 lbs.
The lookout suspect is described as a Hispanic male teenager, approximately 17 years old and 5'7" tall.
Anyone with information is asked to call Crime Stoppers at (800) 577-TIPS (8477).