San Antonio police are on the lookout for two people who robbed a Northwest Side gas station late Sunday night.

The robbery occurred around 11:40 p.m. Sunday in the 9500 block of Culebra Road.

San Antonio police said a man and woman held up Murphy's Express gas station. The woman acted as a lookout while the man robbed the clerk.

The employee told police the suspect lifted up his shirt as if he had a gun and demanded money. The two suspects got an unknown amount of cash and fled the scene.

Police do not have a good description of the suspects because both had their faces covered during the robbery.