FAIRFIELD, Calif. (AP) — Three people were killed when a helicopter contracted by Pacific Gas & Electric struck one of the utility’s power lines and crashed into a Northern California hillside. KCRA-TV reports the Solano County Sheriff’s Office said the three people aboard were killed. The crash ignited a grass fire and knocked out electricity to about 38,000 customers. The FAA says the crash of the Bell 206 helicopter was reported around 1:30 p.m. along Interstate 80, midway between Fairfield and Vacaville. A fire truck responding to the fire rolled over, sending three firefighters to the hospital with minor injuries. The cause of the helicopter crash is under investigation.