Nassau County police are seeking the public’s help in gathering information about a robbery Saturday night in Roosevelt during which a 51-year-old man was punched and his wallet and cellphone stolen.

Police said the incident occurred at 7:20 p.m. when the victim was walking east on Mirin Avenue and was approached from behind by two men about 20 years old who were wearing dark clothing and ski masks.

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The attackers punched the man, knocking him to the ground, and then took his wallet and phone before fleeing in an unknown direction.

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Detectives asked anyone with information to contact Nassau Crime Stoppers at 1-800-244-8477. All calls will kept confidential.