Police are investigating the robbery Tuesday night of a pedestrian in Roosevelt.

The victim, 37, was walking north on Forest Avenue at the Babylon Turnpike intersection at 8:30 p.m. when three men approached him, "punched him in the back of the head, reached into his pants pocket and removed his wallet which contained his identification and an unknown amount of money," Nassau County police said in a Wednesday morning news release.

The assailants were described as about 6 feet tall with thin builds and in their 20s, "wearing black sweatshirts over their heads," police said. They fled south on Forest Avenue.

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The victim had head pain but declined medical attention.

Detectives urge anyone with information about the robbery to anonymously call Crime Stoppers at 1-800-244-TIPS. All calls will be kept confidential.