Nassau detectives are searching for an armed robber who stole money from a cabdriver early Sunday morning, police said.

First Squad detectives said at about 3:50 a.m., a 64-year-old All Island Taxi cabdriver picked up a woman in Mineola and drove her to Uniondale.

The cabdriver dropped the woman off at 187 Maple Ave., and shortly after she paid and walked away, a man wearing a ski mask and gloves approached the driver, flashing a black handgun and demanding cash, police said.

Upon receiving an undetermined amount of money from the cabdriver, the gunman ran away in an unknown direction, police said.

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The cabdriver drove back to All Island Taxi and called Nassau County Police. He described the alleged attacker as 5 feet, 9 inches tall.

Anyone with information is asked to call Nassau County Crime Stoppers at 800-244-8477 (TIPS). All calls will remain anonymous.