Authorities said five people have been killed, including the gunman, and multiple others injured after a shooting rampage that started at a home and ended at an elementary school in rural Northern California.
A number of students were airlifted for medical care after gunfire at Rancho Tehama School, Johnston said.
Law enforcement officers shot the attacker dead, Sacramento television station KCRA reported, citing a sheriff's official.
"It was very clear at the onset that we had an individual that was randomly picking targets", Johnston said.
"I don't know how many victims; I know of at least three deaths", Johnston said. Police recovered a semi-automatic rifle and two handguns they believed were used by the shooter. The first calls described a shooting on Bobcat Lane; calls from multiple other sites soon came in, including the elementary school.
A 30-year-old man was also being taken to the hospital with a gunshot wound to the right thigh, according to emergency dispatch reports.
Jim Schultz, a court reporter with Redding.com, was live-tweeting an interview with the alleged shooter's neighbor, Brian Flint, who said the suspect harassed him. About 100 students attend the school, which has kindergarten through fifth grades. He says he and his roommate told authorities that their neighbor was acting "crazy" and threatening them. Flint said the neighbor had been shooting "hundreds of rounds" from large magazines. No information about their conditions was immediately available, according to a spokeswoman for the hospital, about 45 miles from the school.
Separately, three people were being treated at a hospital in Redding, about 80km north of the shootings. Three of those patients are students.