The victims were as young as 6, authorities said.
Sixteen homes were evacuated while emergency personnel responded to the blast.
Homicide detectives are investigating after a man was found dead inside a mobile home in Pomona that went up in flames Tuesday night.
Police are looking for additional victims and noted the 44-year-old from Chino also owns a replica of the "Scooby Doo" van.
Two women were found dead Saturday at an assisted living facility for the elderly.
The victim died at the scene, and the driver of the vehicle was treated at a local hospital and then admitted.
Los Angeles Fire Department paramedics were called to the scene where they treated one patient who did not require medical transport.
The suspect was booked without bail in West Covina due to potential victims given his "prior place of employment, a church," police said.
Two men were wounded, including one critically, at a parking lot Sunday in Pomona, authorities said.
The case remains under investigation by the Los Angeles County Sheriff’s Department, Arson Unit.
Cell phone video showed fire and smoke engulfing the complex early Thursday morning.
Officers with the California Highway Patrol responded to an incident on the transition road between the 60 and 57 Freeways.
The Los Angeles County Sheriff's Department and the college's Police and Campus Safety are investigating the bomb threat.
Yaxin Zheng's family hasn't heard from her since Dec. 29, the Los Angeles County Sheriff's Department said.
Several residents have received scam phone calls from individuals claiming to be from the Los Angeles County Sheriff's Department.
Officers will be out in full force on highways and freeways through Diamond Bar and Walnut amid one of the year's heaviest traffic times.
Jimmy Yunjoon Kim, 26, had been missing since Saturday, according to the Walnut/Diamond Bar Sheriff’s Station.
The Walnut/Diamond Bar Sheriff's Station will host a catalytic converter theft prevention event on Wednesday, Nov. 17, 2021.
A new order now allows all units to be once again occupied at the Village at Diamond Bar while limiting access to certain areas.
Juting “Katie” Kuo, 25, was last seen on Oct. 25, according to the Walnut/Diamond Bar Sheriff’s Station.
Join Los Angeles County in participating in The Great California ShakeOut earthquake drill at 10:21 a.m. on Thursday, Oct. 21, 2021.
Bruce Bodel, 72, was killed after being hit by a car while crossing a street in Diamond Bar on July 4.
The Walnut/Diamond Bar Sheriff Station is hosting a free event to help crackdown on catalytic converter thefts in the area.
The scheme involved tricking people into purchasing Target gift cards as part of a money-laundering operation, federal prosecutors said.
The head of the Los Angeles County Sheriff's Department will hold a conversation about public safety at the Walnut Senior Center.
Opening statements began Wednesday over claims that Monsanto's weed killer caused a now-10-year-old boy to develop Burkitt's lymphoma.
The Mugs coffee shop will host the event, where Diamond Bar and Walnut residents get a chance to meet and greet with a sheriff's deputy.
The webinar will provide residents with an overview of “several areas that make up the city’s public safety program.”
The Los Angeles County Sheriff will be in Walnut on Sept. 23 to hold a "community conversation" on public safety.
Residents of Walnut and Diamond Bar will have the chance to discuss public safety with a sheriff's deputy over a cup of coffee.
Authorities are still searching for the person whose car struck and killed 72-year-old Bruce Bodel on July 4.
Steven Klein, 51, of Arizona, died after his Harley-Davidson was rear-ended by a big rig on the 57 Freeway in Diamond Bar.
Walnut and Diamond Bar residents will get to have a meet and greet with a sheriff's deputy Tuesday at the Coffee Bean & Tea Leaf.
The man died after his pickup truck crashed into a tree in Diamond Bar during the early-morning hours of Aug. 13.
The Walnut/Diamond Bar Sheriff's Station will host the catalytic converter etching event to help curb a rise in thefts of the auto part.
Bruce Bodel, 72, died after being struck by a passing car on July 4 while walking near his Diamond Bar home.
The accident occurred Monday night on North Sunflower Avenue in Covina.
A dry air mass from Arizona has brought high temperatures 10 degrees above normal for this time of year.
The event will etch a vehicle's catalytic converter to help deter thefts in the area, the sheriff's officials said.
The 34-year-old man had been missing after he was last seen in the 20100 block of Barnard Avenue in Walnut, according to sheriff's deputies.