
Police in the California city of Fresno were investigating a shooting at a football backyard party on 18th November in which at least 10 people were shot. Four people were killed, with five others left in critical condition and another wounded, police said.
Three men died on the scene and another died at a hospital, Fresno Deputy Police Chief Michael Reed said in a late-night news conference.

On his 16th birthday, a California student opened fire at his school mates, killing two and injuring three on 14th November, pulling a .45 calibre semiautomatic handgun from his backpack and emptying it in a matter of seconds as the school day began.
He saved the last bullet for himself.

Four people were shot dead at a crowded Halloween costume party on 3rd November at a house in Orinda in Northern California.
The shooting took place around 10:45 pm at a house party with more than 100 people attending in an expensive neighbourhood of Orinda, a small city across the bay from San Francisco.

At least three people were killed after a gunman opened fire at a food festival in Gilroy on July 29, California in the United States.
Police said multiple casualties were reported in the shooting with the shooter "still active".

A gunman barged into a large, crowded Los Angeles-area country music bar and dance hall and opened fire on 8th November, wounding at least 11 people including a police officer.