Seven people have been fatally shot at what US authorities have called an illegal marijuana growing operation in the southern California countryside and suspects are being sought.
The Riverside County Sheriff's Department responded to a report of an assault with a deadly weapon on Monday at 12.33am local time.
Deputies found a woman suffering from gunshot wounds at a home in the unincorporated area of Aguanga, 161km southeast of Los Angeles.
Paramedics rushed her to the hospital, the sheriff's department said in a statement.
Six others with gunshot wounds were also found at the residence in the 45000 block of Highway 371, the statement said.
"All six victims at the location died as a result of their injuries. Despite life-saving efforts by medical personnel, the female who was transported also died from her injuries," the statement said.
"In total, seven victims died as a result of this incident."
More than 450kg of marijuana and several hundred marijuana plants were found at the scene, the sheriff's department said.
A search of the area failed to immediately locate suspects.
An investigation was underway and no further information was immediately available, sheriff's department Corporal Lionel Murphy told Reuters.
"This appears to be an isolated incident and there is no threat to the general public," the sheriff's department said.