First responders attended the scene
Updated at 22:04
A gunman has opened fire with a pistol in a Californian classroom, killing a female teacher and injuring two students before taking his own life.
The students were not thought to have been deliberately targeted by the attacker but were wounded due to being in close proximity to his victim.
The wounded pair were taken to hospital following the suspected "murder-suicide" at North Park elementary school in San Bernardino.
Their condition was not known but police said they were not related to either of the adults.
School district spokeswoman, Maria Garcia, said the shooting was thought to have been a domestic dispute.
"We believe the teacher knew who the shooter was," Ms Garcia said.
She said all other students were safe and were being taken to a local college campus.
Aerial footage showed youngsters being escorted across a playground.
Elementary schools in the US are for children aged 4-14.
Police chief Jarrod Burguan said on Twitter: "Two adults are deceased in a classroom, believed to be a murder-suicide.
"We believe the suspect is down and there's no further threat."
He added: "There are two wounded, possible students. Taken to local hospitals, condition unknown."
He went on: "Students at the school are being taken to Cajon high school for safety."
In December 2015, San Bernardino was hit by a mass shooting at a meeting which left 14 people killed and 22 others injured.
Husband-and-wife attackers Syed Rizwan Farook and Tashfeen Malik died in a gun battle with authorities later that day.