At least one person has died and nine more were injured after shots were fired at a graduation party in San Bernardino, California.
It happened shortly before midnight local time, with a 21-year-old man, who has not been named, reported to have been killed.
A witness told ABC 7 they had seen a shooter open fire at two young women through a car window.
The onlooker said it appeared that a large group was gathered for a graduation party.
One person was declared dead at the scene, while those injured are not thought to have suffered life-threatening injuries, according to reports.
In a statement the San Bernardino Police Department said: "Upon arrival, officers encountered a large crowd and learned that they were in the area attending a party."
Police spokesman Sgt. Equino Thomas told the Los Angeles Times that a preliminary investigation suggests the victims were not intentionally targeted.
Instead it is believed that the shooting resulted from an argument in a crowded room at the party, he said.
No arrests have been made in connection with the shooting, police have said.
We'll be bringing you the very latest updates, pictures and video on this breaking news story.
