MILLBRAE (CBS SF) — Authorities have released police sketches of two suspects who robbed a gas station in Millbrae.

It happened Monday at the Valero Gas Station located in the 400 block of El Camino Real, at about 10:15 p.m.

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A clerk told sheriff’s deputies two masked men entered the store and demanded he open the safe. When he told them he couldn’t, they shoved him and took money from the cash register.

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One man was armed with a semi-automatic handgun, he said.

(San Mateo County Sheriff’s Office)

(San Mateo County Sheriff’s Office)

The suspects fled in a silver or dark 1990’s SUV.

No shots were fired.

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Authorities are asking the public’s help in identifying the suspects. Anyone with information is asked to call (650) 259-2321, or the Sheriff’s Office anonymous tip line at (800) 547-2700.