A clerk at a 7-Eleven store in Hauppauge suffered a minor injury during an early morning robbery Monday, police said.

Suffolk County police received a 911 call at 1:49 a.m. reporting a possible robbery at the store on Town Line Road. Police said the robber displayed "what appeared to be a gun" -- and demanded cash.

Investigators are now confident the weapon was a BB gun. The clerk apparently was struck by a fired BB and suffered a minor wound that required stitches at Stony Brook University Hospital, police said.

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The robber was described as 6-foot tall with a thin build.

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Police did not detail how much cash was taken.

Police are asking anyone with information regarding the robbery to call the Fourth Squad at 631-854-8452 or Crime Stoppers at 800-220-TIPS.

All calls will remain confidential, police said.