Nassau County police are looking for the man who robbed the Bethpage Federal Credit Union in Baldwin on Friday afternoon.
Authorities said the man entered the building at 1800 Grand Ave. around 1 p.m. and gave the teller a note demanding money.
There were five employees and three customers in the bank during the robbery, police said. No injuries were reported.
The 6-foot-2 robber made off with an undisclosed amount of cash and ran west through the rear parking lot, police said.
He wore dark clothes, gloves and a black mask, police said.
Anyone with information is asked to call Nassau County Crime Stoppers at 800-244-TIPS. All callers will remain anonymous.