Nassau County police are investigating a robbery that took place early Saturday in Roosevelt, authorities said.

Police said two men approached a 27-year-old victim walking near Babylon Turnpike and Seaman Court at 4:40 a.m. One of the men displayed a black handgun, struck the victim in the head and stole a gold chain from around his neck, police said.

The victim suffered a bruise on his head but refused medical attention. The two robbers ran south on Babylon Turnpike.

Authorities encourage anyone with information to call Nassau County Crime Stoppers at 800-244-8477.

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Newsday probes police use of force ... Let's Go: Holidays in Manorville ... What's up on LI ... Get the latest news and more great videos at NewsdayTV

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