Nassau County police are looking for a man who they said entered a woman’s basement in Roslyn Heights early Saturday morning.

Police said a woman, 54, was in her Madison Avenue home with her 16-year-old son when she heard a noise in the basement at about 12:05 a.m. She turned on a light and didn’t see anyone, but when she returned to the living room and turned on a light, she saw a man running from the side of her home, police said.

Police arrived and determined that someone had entered her basement, though nothing is believed to have been stolen.

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The burglar was described as a 6-foot-tall male weighing about 150 pounds and wearing a blue jacket and jeans.

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