Nassau police are looking for an armed man who robbed a North Valley Stream pharmacy Tuesday morning.

Police said the man walked into the Crescent Pharmacy at 48 Crescent Court at 11:37 a.m. armed with a knife and demanded money. After being given an undetermined amount of cash, the suspect fled on foot, heading north on Crescent Court, police said.

Three employees were in the store at the time of the robbery, and no one was hurt, police said.

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Police described the robber as being 6 feet tall and wearing a black jacket, black hooded sweatshirt, black mask, dark glasses, gloves and black pants.

Anyone with information on this robbery is asked to call Nassau County Crime Stoppers at 800-244-TIPS. All callers will remain anonymous.