Police said that the male suspect entered the Fast Break Food Mart located on Merrick Avenue in North Merrick, displaying a handgun as he approached a cashier.
The suspect proceeded to steal an undisclosed amount of cash from the register and fled on foot northbound onto William Street, according to police.
Investigators described the suspect as a 5-foot-3 African American weighing approximately 170 pounds.
Police said that the suspect, who was approximately 17 years old, was wearing a black ski mask, black gloves, a black hooded sweatshirt, gray sweatpants, and black sneakers at the time of the alleged robbery.
Anyone with information regarding the robbery, or who has information regarding the incident, has been asked to contact Nassau County Crime Stoppers at 1-800-244-TIPS or calling 911.
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