Northwest District police are investigating an armed robbery of a vehicle at a Riverside-area gas station early Saturday morning.

The victim told patrol officers that two men put a silver handgun in her face before stealing her 1998 Buick Century.

The robbery occurred at about 2:15 a.m. Saturday at the Getty gas station at 584 Ontario St., a few blocks southwest of Kenmore Avenue.

The car is green and has a dent on the driver-side back door, according to police reports.