At least five people are dead following a shooting at multiple locations in Tehama County including a local elementary school, where at least two children were wounded.
A number of students are reported to have been hurt at a primary school in Rancho Tehama Reserve, about 130 miles north of Sacramento.
The attacker was killed by police.
Tehama County Assistant Sheriff Phil Johnston said officers were investigating at least five crime scenes in the area.
Jeanine Quist, an admin assistant with the Corning Union Elementary School District, said no one was killed at the school but a “number” of students were shot and wounded.
Mr Johnston said police were alerted to the shooting at around 8am local time (4pm GMT).
Multiple shots were fired at the school and he was aware of at least three people killed, he added.
“I’m told the suspected shooter was deceased by law enforcement bullets,” Mr Johnston said.
It was not clear if the attacker was included in the death toll.
Coy Ferreira, a parent at the school, told KRCR-TV that he heard a series of gunshots through a classroom window and saw one young boy shot in the foot and chest and a second student shot in the arm. Both were alert and conscious, he said.
The owner of a nearby cafe, Coffee Addiction, told The Times that she called 911 after hearing gunfire and screaming at the elementary school.
The woman, who identified herself only as Tiffany, said she heard about 100 rounds fired from what sounded like multiple guns.
The business owner said she and her husband and their four children moved to the area from Redding about seven years ago. She said that they have always felt safe.
“It’s a great community,” she said. “I am hoping it doesn’t get some kind of bad rap because of one person in one area.”
Rancho Tehama has a population of roughly 3,500 people, she said.
“We have had an active shooter incident at Rancho Tehama Elementary this morning,” read a statement from the Corning Union Elementary School District website. “There are confirmed injuries. We are cooperating with law enforcement during this investigation but do not have specific details at this time.”