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SAN DIEGO — A man armed with a gun robbed a gas station Tuesday in the Roseville neighborhood of Point Loma, according to San Diego police.

The incident occurred around 4:45 p.m. at the USA gas station on the 1500 block of Rosecrans Street.

The suspect walked up to the clerk inside the gas station kiosk, knocked on the glass with a black semi-automatic handgun and demanded cash.

The suspect fled on foot with an undisclosed amount of cash. He was described as a white male, 6 feet tall and in his 40s.

The San Diego Police Department Robbery Unit is investigating.