Masked thief armed with machine gun robs convenience store in Prince George's Co.

Masked thief robs convenience store on Aug. 4 in Lanham, Md. Wednesday, Aug. 9, 2017 (Prince George's County Police)

A masked thief carrying a machine gun robbed a convenience store on Aug. 4 in Lanham, Maryland.

Police say the robbery happened in the 9000 block of Annapolis Road.

In surveillance photos released by investigators, the thief is wearing what appears to be a green mask and all black.

Prince George's County Police are asking anyone with information on the robbery to call 301-772-4925 or 1-866-411-TIPS.

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