Two people were killed after a house filled with a giant stash of fireworks exploded in a neighborhood east of Los Angeles Tuesday afternoon, authorities said.
The blast shattered windows in nearby homes and caused shaking throughout parts of Ontario, California.
Details about the victims were not immediately available.
Authorities confirmed the explosion was caused by a large amount of fireworks igniting. The FBI, ATF and a local bomb squad swept the area where the blast occurred, which was believed to be a backyard of about a half an acre, to ensure there were no other live fireworks, NBC4 reported.
Multiple blasts of what were believed to be commercial grade fireworks erupted from a home in the area of Fern Avenue and Francis Street, engulfing at least two properties in flames and filling the air with clouds of thick smoke and fireworks going off.
The home where the blast originated was reduced to rubble as firefighters battled the blaze and fireworks going off more than an hour later.
The explosion prompted an evacuation order for the area and a temporary care and reception center was established at the De Anza Community Center.
Emergency crews were seen taping off an area on the property with crime scene tape and covering what appeared to be a body at around 2 pm local time, ABC 7 reported.
A house filled with a giant stash of fireworks has exploded in a neighborhood in Ontario, shattering windows in nearby homes and causing shaking throughout parts of California
Multiple blasts erupted Tuesday afternoon from a home in the area of Fern Avenue and Francis Street engulfing at least two properties in flames and filling the air with clouds of thick smoke and fireworks going off
It is not clear if anyone was in the property at the time and authorities have not yet confirmed any known injuries
The first explosion went off around 12:30 pm with eyewitnesses saying there were two further blasts just minutes apart.
Dan Bell, a City of Ontario spokesman, confirmed to DailyMail.com there had been ‘multiple’ explosions initially before fireworks started firing into the air.
He said there were two structures on the ranch-like property – a main house on the street and a back house – and both were engulfed in flames.
The city’s Twitter account also confirmed the explosion was caused when a large amount of fireworks inside a home ignited.
Aerial footage from KTLA shows the roof of one of the properties completely blown off and much of the charred building reduced to rubble.
Firefighters battling the blazes were seen at one point trying to rescue a horse trapped in an enclosure on the compound, according to ABC 7.
An eyewitness told the outlet he witnessed three separate explosions before the fireworks started going off. A neighbor and her dog were injured by debris from the blasts, he said.
Aerial footage shows the roof of one of the properties completely blown off and much of the charred building reduced to rubble
Emergency crews rushed to the scene with firefighters still seen battling the blaze around an hour later as fireworks were still going off
Authorities confirmed the explosion was caused by a large amount of fireworks igniting
Footage circulated on social media of one of the initial blasts shows a huge eruption coming from behind the back of some one-story properties in the residential area.
Fireworks are seen shooting into the air while a thick plume of smoke billows out.
Reports on social media said the blast was felt as far as a mile away with residents in Anaheim and Huntington Beach impacted by the blast.
The City of Ontario urged people to stay away from the area while The Ontario Police Department and the Ontario Fire Department are on the scene.
‘We are aware of the loud explosion that was heard recently,’ it said on Twitter.
‘The Ontario Police Department and the Ontario Fire Department are investigating it. Please stay clear of the area.’
The first explosion went off around 12:30 pm with eyewitnesses saying there were two further blasts just minutes apart
Social media footage shows the smoke from the blasts filling the air Tuesday afternoon
Firefighters battling the blazes were seen at one point trying to rescue a horse trapped in an enclosure on the compound
In a follow-up tweet, the city confirmed the blast was caused by a ‘large amount of fireworks’ which caused a ‘large structure fire.’
‘A large amount of fireworks at a house ignited, causing a large structure fire. Explosions being heard are by fireworks at this time,’ the city tweeted.
The Ontario Fire Department said multiple units were drafted to the scene and urged people to stay out of the area.
Firefighters then issued an evacuation order for Francis Street and Maple Avenue between Fern and San Antonio avenues around 2 pm.
Roads were also shuttered in the local area and a temporary care center was set up along South Fern Avenue.
Bell told DailyMail.com authorities could not yet confirm if anyone was inside the property at the time of the blast or if there were any fatalities.