Nassau Police are searching for a man they say robbed a Franklin Square gas station early Thursday morning, possibly at gunpoint.

Authorities say an unidentified man entered the Sunoco gas station at 355 Franklin Ave. around 2:30 a.m., displayed what was believed by the clerk to be a handgun under a black cloth, and demanded money.

The pair struggled and the suspect struck the male clerk in the face before reaching onto the counter and stealing the clerk’s cellphone.

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The suspect ran away and has not been found, authorities said.

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The clerk, who suffered minor injuries, described the suspect as between 20 and 25 years old, 5 feet, 7 inches tall and with a thin build. The suspect was wearing a black hoodie with a black mask covering his face, the clerk said.

Anyone with information should call Crime Stoppers at 800-244-TIPS, authorities said, adding that all callers will remain anonymous.