Police are searching for a masked gunman who robbed a Shamrock gas station on Merrick Road in Baldwin early Tuesday morning.

The robber -- masked, wearing dark-color clothing and displaying a black handgun -- entered the station at about 4:15 a.m. and demanded cash from the 18-year-old attendant, Nassau County police said.

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He then fled on foot. Police said no one was injured in the robbery.

Detectives are asking that anyone with information about this crime call Crime Stoppers at 800-244-TIPS. All calls will remain confidential.