Authorities are looking into whether grenades recovered from a Santa Monica apartment complex were the cause of an explosion last week at a Los Angeles County Sheriff’s Department training facility.

Three members of the arson and explosives unit of the Los Angeles County Sheriff’s Department have been killed in a blast at the department’s training facility.

An explosion at a Los Angeles County Sheriff’s Department training facility killed three veteran deputies from the arson and explosives unit.

Press advocates are questioning whether journalists covering the Los Angeles immigration protests have become targets of law enforcement.

A police officer was killed and another was injured in a shooting in a city east of Los Angeles.

The Los Angeles County Sheriff’s Department says it will retest 4,000 DNA samples and open an internal investigation after learning that it used potentially flawed test kits for eight months.

Evacuation orders have been lifted for tens of thousands of people as firefighters with air support have slowed the spread of a huge wildfire churning through rugged mountains north of Los Angeles where dangerous winds gained strength again.

More than 50,000 are under evacuation orders or warnings as a new wind-driven wildfire spreads in the mountains north of Los Angeles.

Windy, flame-fanning weather in Southern California has eased up as firefighters report significant gains against the two massive wildfires burning around Los Angeles.

Easing winds have delivered a brief but much-needed reprieve to firefighters as they battle two massive blazes in the Los Angeles area.

A growing force of firefighters and equipment has moved into the Los Angeles area.

Firefighters scrambled to make further progress against wildfires that have killed at least 24 people in the Los Angeles area as forecasters again warned of dangerous weather with the return of strong winds this week.

The Los Angeles County medical examiner’s office says the confirmed death toll from the wildfires ravaging the area has risen to 16.

Some Los Angeles area residents have begun returning to their still smoldering neighborhoods to search for memories even as the threat of new fires persists.

The aging computer dispatch system for the nation's largest sheriff's department remains out of commission.

Rowdy crowds took to the streets in Los Angeles after the Dodgers won the World Series, setting a city bus on fire, breaking into stores and setting off firecrackers.

A man has been arrested in the ambush killing of a Los Angeles County sheriff’s deputy who was shot as he sat in a patrol car.

Authorities are asking for the public’s help and offering a $250,000 reward as investigators search for the assailant who shot and killed a Los Angeles County sheriff’s deputy as he sat in his patrol car at an intersection.

The FBI has opened criminal investigations into violent encounters involving Los Angeles County sheriff’s deputies.

Authorities say a man has been arrested in the weekend killing of a Catholic auxiliary bishop that shocked Los Angeles religious and immigrant communities.

In less than 48 hours, two gunmen went on shooting rampages at both ends of California that left 18 dead and 10 wounded.

Authorities say the 72-year-old gunman who sprayed bullets into a Southern California ballroom dance hall, killing 11 people, had no known connection with the victims and investigators are still trying to determine a motive for the massacre.

The police chief in the California city where 20 people were shot at a ballroom dance hall, 11 fatally, has defended his decision not to warn the public for hours that a killer was on the loose.

California is reeling from three major mass shootings in just over a week.

Investigators searching for a motive in the worst mass shooting in Los Angeles County history say a search of the gunman’s home discovered a rifle, hundreds of rounds of ammunition and evidence he was manufacturing gun silencers.

A joyful kickoff to the first Lunar New Year celebration in Monterey Park since before the pandemic was marred by tragedy after a gunman opened fire inside a dance hall, killing 10 people in the majority Asian city near Los Angeles.

Authorities say the suspect in a California dance club shooting that left 10 dead has shot and killed himself.

Los Angeles County, the nation's most populous, is getting a new sheriff.

Police seized high-powered weapons and high-capacity magazines during a search of a home. (CNN) - Long Beach, California, police arrested a man they say was planning a mass shooting, the police chief said. Police arrested Montoya at his Huntington Beach home after getting a tip from a fellow employee about Montoya's plans, Luna said. The arrest is the latest in a string of detentions or investigations over threats to commit mass shootings. At least 28 people have been arrested since the shootings in El Paso, Texas, and Dayton, Ohio, earlier this month.