Police are investigating reports that a pedestrian was shot by Interstate 805 in Chollas View.
Around 8:10 p.m. Monday, a witness told police two men walked up to another pedestrian at the Market Street on-ramp to I-805 and shot the pedestrian.
One of the men allegedly pulled out a gun and fired at least one shot, according to San Diego police.
Once officers arrived at the scene, they found a shell casing for at least one bullet.
No victim was found in the vicinity.
The investigation is on-going.