FONTANA, Calif. (KABC) -- A California Highway Patrol officer was wounded after being shot during a traffic stop in West Covina.Officers attempted to pull over a Cadillac Escalade shortly after 1:30 a.m. for a traffic violation on the 10 Freeway at Sunset and Garvey avenues.After the officers pulled the car over, a man exited the Escalade and fired a shotgun at officers, who returned fire, investigators said. One of the two officers was injured. That's when the officers called for backup.The wounded officer, a six-year veteran of the CHP, was transported to Los Angeles County-USC Medical Center. The extent of his injuries were not considered serious, and he was reported to be in stable condition. His identity was not immediately released.The suspect was also shot, but he still took off. Several law enforcement agencies pursued the suspect, who was driving erratically heading eastbound on the 10 Freeway.Officers lost the suspect at one point before catching up with him near Arrow Boulevard and Citrus Avenue in Fontana, more than 30 miles from the original scene. There, he was taken into custody with the help of K-9 support.The suspect was transported to Arrowhead Regional Medical Center for injuries sustained during the incident.A shotgun and other weapons were recovered inside the suspect's vehicle, investigators said. The suspect's identity was not released. He was only described as a 30-year-old man.Officials said the suspect's vehicle is registered to the suspect, and it has an Uber sticker on the windshield.According to initial reports, there was a female passenger inside the Escalade when the suspect first shot at the CHP officers. Detectives are interviewing the officers involved in the shooting to verify those reports.Detectives are also investigating if the suspect is a Uber driver because his car contained the company's logo in a sticker on his windshield.