Nassau police said a gunman entered a Dunkin' Donuts in Elmont early Tuesday and stole money from the cash register after demanding it from the shop's 22-year-old employee.

The 12:55 a.m. robbery occurred at 238-19 Linden Blvd., police said. There were no customers in the store at the time and no one was injured.

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The subject is described as being between 18 and 25 years old, 6 feet tall, wearing a white sweatsuit with hood and a black mask, and carrying a black handgun.

Police ask anyone with information about the robbery to call Crime Stoppers at 800-244-TIPS.