Kids wounded, 3 people dead in US shooting

Traffic backs up outside Rancho Tehama, California, after multiple people were killed in a shooting

A series of shootings at multiple locations in rural northern California has left three people dead and several others wounded, including students at an elementary school, authorities say.

Law enforcement officers killed the shooter but it was not clear if authorities counted it among the three deaths.

Tehama County Assistant Sheriff Phil Johnston on Tuesday told a TV station in the city of Chico that officers are investigating at least five crime scenes in and around the school in Rancho Tehama Reserve, about 210km north of Sacramento.

"It was right about 8am, we had multiple shots fired in Rancho Tehama," Johnston said. "That evolved to multiple victims and multiple shots at the school, at the elementary school. I am told at this point the suspected shooter is deceased by law enforcement bullets, that's what I'm told."

Jeanine Quist, an administrative assistant with the Corning Union Elementary School District, said no one was killed at the school with kindergarten through fifth grades but that a "number" of students were shot and wounded.

Johnston said the school had been cleared by 10am but he did not have any information about the victims there.

Three people were being treated at a hospital in Redding, about 80km north of the shootings, Mercy Medical Center spokeswoman Marcy Miracle said. She declined to provide other details about the victims or their injuries.