A massive fireworks explosion in an Ontario, California neighborhood resulted in the death of two residents on Tuesday afternoon.

Fireworks Explosion Fire

Fire crews were trying to put out a fire that was allegedly caused by a “large battery of fireworks,” some of which were believed to be “commercial grade,” powerful enough to be used at fireworks shows, said Ontario Fire Department Chief Ray Gayk.

While authorities did not reveal the identities of the two victims, residents in the area were evacuated from their homes. “What we are doing right now is working with Ontario fire and bomb squad, clearing the area of any unexploded ordinance,” said Gayk, NBC News reported.

Witnesses recorded the incident on video and shared them on social media. The footages show fireworks explosions flying through the air in broad daylight.

A helicopter video footage of the scene showed firefighters freeing horses from a barn. Gayk said a horse and a dog were rescued from the area.