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MISSION BAY, Calif. — Two people were killed and a third person was injured when their vehicle struck a boulder and burst into flames near Interstate 5 Saturday.

San Diego Fire-Rescue said firefighters went to Friars Road and Pacific Highway at about 7:30 a.m. to investigate a small brush fire when they also found a car ablaze.

They extinguished the 10,000-square-foot fire within an hour, but two occupants of the car were pronounced dead at the scene, officials said.

One man escaped the vehicle and was taken to UC San Diego Medical Center for minor cuts and burns.

According to San Diego police, the victims were headed eastbound in the 4800 block of Friars Road when their car veered off the road and struck a large boulder.

Police said alcohol was involved in the crash.

One of the two people killed was a woman. Officials believe the other victim was a woman but that has yet to be confirmed by the county medical examiner.