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A shooting on the westbound 60 Freeway in Pomona left a driver with a gunshot wound to the leg and resulted in a multi-vehicle crash, officials said Monday.

The shooting was reported just before midnight Sunday near the Reservoir Street exit, following some sort of gathering, California Highway Patrol Officer Rodrigo Jimenez said.

An Infiniti was traveling west on the freeway when another vehicle approached and someone inside it fired at least six shots at the Infiniti, according to CHP.

“We don’t know if they got into some sort of argument,” the officer said. “They both got on the freeway traveling westbound, and that’s when the suspect vehicle shot the Infinity on the left side.”

A bullet struck the driver of the Infiniti, a 24-year-old Compton man, in the leg. The driver then lost control of the car and crashed into a center divider, suffering injuries to his face.

His passenger, a 22-year-old Compton man, left the scene, but was later detained by Pomona Police Department officers, the officer said. The passenger had also sustained some injuries from the crash, but hadn’t been shot, according to CHP.

“A firearm was located near the passenger’s vicinity. However, we’re still not sure how that firearm is involved in this incident,” Jimenez said.

The suspect vehicle continued west and the shooter still hadn’t been found later Monday afternoon.

Investigators don’t believe it was a random shooting, Jimenez said.

When the Infiniti crashed, a driver in the vehicle behind it took an evasive maneuver to avoid hitting it and spun out of control, coming to a stop facing the wrong way. A third car then slammed head-on into it.

The driver from the third vehicle, a man in his 50s, was taken to a hospital with major injuries, including a broken leg, according to CHP.

Several damaged vehicles could be seen on the rain-soaked highway Monday morning, video showed.

Officials said they didn’t have much information on the suspect’s vehicle and were asking for the public’s help identifying the vehicle and shooter.

The shooting remains under investigation, and no further details were available.

Anyone with information is asked to call CHP at 626-338-1164.