Angel Anthony Cintron allegedly displayed a hypodermic needle before demanding property from his victims, who were all male, and as young as 14. Among the items stolen were iPads, iPods and cell phones, police said.
No one was hurt in the incidents.
Neighbors have been warned of Cintron, with wanted fliers posted throughout the area.
"I've heard about it," said Elaine Polanco. "They have a photo at the store."
Cintron, 38, is described as being 5 feet 8 inches tall, 145 pounds, with brown eyes and black hair. He has a scar underneath his left eye and on the bridge of his nose and tattoos with writing on both sides of his neck.
Anyone with information in regards to these incidents is asked to call Crime Stoppers at 1-800-577-TIPS or at NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577.
All calls are kept strictly confidential.