Nassau police are looking for two men who attacked and robbed a 20-year-old man as he was leaving a Nassau Community College building in East Garden City on Tuesday afternoon.

Police said the victim was exiting through the rear of the college's North Hall at 4:15 p.m. when two men approached him. As he turned to go east on Miller Avenue, one of the robbers struck the back of his head with a black handgun, police said, then stole the victim's watch, cellphone and gold chain.

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Police said the pair fled in an older-model gray Ford Mustang. The victim suffered a bruise to his face.

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The first suspect was described as being in his 20s, about 5-foot-7 and 150 pounds. The second suspect was described as 6 feet tall, 220 lbs. and about 25 years old.

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