A suspect tied to at least three robberies at Queens eateries in the last month struck again Wednesday night at a Subway restaurant, police said.

Around 9:25 p.m. Wednesday, the man entered a Subway at 205-12 Northern Blvd. in Bayside and went directly behind the counter, police reported. He displayed a knife and demanded that the register be opened before fleeing with $400 in cash.

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The suspect’s robbery spree allegedly began on May 11 when police said he robbed a Carvel ice cream location at 103-21 Metropolitan Ave., similarly using a knife before taking $500 from the register’s cash tray.

That incident was followed on May 23 when the suspect allegedly hit a Dunkin' Donuts at 146-36 45th Ave. and fled with $600 before hitting another Dunkin' Donuts two days later at 163-02 Cross Bay Blvd. and taking $776 in cash, police stated.

Besides his fourth robbery in Queens, the suspect may also be connected to 17 other robberies in Long Island, ABC7 reported. 

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Authorities described the suspect as a black man around 5-foot-9 with a medium build who was last seen wearing a gray hoodie with dark jeans and boots.

Anyone with information should call the NYPD's Crime Stoppers hotline at 1-800-577-TIPS or, for Spanish, 1-888-57-PISTA. The public can also submit tips by logging onto the Crime stoppers website at www.NYPDcrimestoppers.com