A woman traveling eastbound on the 210 Freeway in Arcadia on Saturday morning was killed after she was shot by someone in another car and crashed, authorities said.

California Highway Patrol officers received reports of the shooting and crash near Baldwin Avenue about 9:05 a.m. They found a black Mercedes had hit the right shoulder wall, Officer Vince Ramirez said. The driver, a woman about 40-years-old, died at the scene.

It was not clear if she was alone in the car, Ramirez said at a news conference near the freeway on Saturday afternoon.

CHP officers stopped short of calling it a “road rage” incident, saying they were still investigating. The shooter remained at large.

Officers shut down the eastbound lanes of the freeway at Baldwin Avenue at 9:30 a.m. Some lanes reopened by about 3:15 p.m. and all lanes had re-opened by just after 6 p.m. Eastbound traffic had been diverted to Michillinda Avenue.

FINAL UPDATE: All lanes are open on Eastbound I-210 at this location. #RoseBowl #Pasadena #ncaa #UCLA #uclafootball #LSU #lsufootball #latraffic https://t.co/R7SivliGSG

— Caltrans District 7 (@CaltransDist7) September 5, 2021

The closure had resulted in a four-mile backup and a 49-minute delay as of 11:30 a.m., according to Caltrans.

It wasn’t certain whether the shooting occurred before or after the crash, but CHP officers said it appeared that the woman likely died from a gunshot wound.

Multiple people exited their vehicles and were walking in lanes, CHP Officer Peter Nicholson said on Saturday morning, but Ramirez later said no other vehicles had crashed.

The freeway crime scene extended from the end of the Michillinda on-ramp to Baldwin Avenue.