Nassau police are investigating a Friday robbery of a North Bellmore convenience store, authorities said Sunday.

A suspect entered Quick Stop, at 2741 Jerusalem Ave., and displayed a black handgun as he approached a male employee and demanded cash around 1:11 p.m., police said.

Authorities said the robber then reached into the cash register and grabbed an undetermined amount of cash. He was last seen heading north on foot along Harrison Street.

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Police said the suspect wore a camouflaged ski mask and a dark hat, and is described as being 5-foot 9-inches tall, with a stocky build.

Police encourage anyone with information to call 1-800-244-8477.