A gunman robbed the Roslyn Savings Bank in Oceanside Monday afternoon, Nassau police said.

Police said a slim man about 6 feet, 3 inches tall and wearing a black hooded jacket and black mask brandished a handgun and demanded money from a teller at 3:08 p.m. before fleeing the bank, located at 3140 Long Beach Road.

It was not immediately known how much money he took.

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Five employees and one customer were in the bank at the time. No injuries were reported.

Detectives request that anyone with information regarding this crime contact Nassau County Crime Stoppers at 800-244-TIPS. All callers will remain anonymous.