A gunman robbed a women's clothing store and a shopper in East Farmingdale Monday morning, tying three people up before getting away with cash, Suffolk County police said.

Armed with a handgun, the suspect entered Avenue, a store at Airport Plaza, about 10:30 a.m., when two employees were inside, authorities said.

During the holdup, a shopper came in, and the gunman ordered the workers and the customer into a backroom, where they were tied up, police said. The robber ran off with the customer's purse, police said.

The victims freed themselves and called 911, police said.

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Store employees said no one was injured and declined to comment further.

The robber was described as 6 feet tall with a thin build, police said.

First Precinct detectives said anyone with information could call them at 631-854-8152 or contact Crime Stoppers at 800-220-8477.