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Several injured after utility explosions at California shopping complex

California Oktoberfest Explosion

The Huntington Beach Fire Department also report that 10 ambulances responded to the scene to transport patients but that the number of patients taken to hospital remains unknown.

An explosion inside an underground electrical vault at a popular Oktoberfest celebration left civilians and firefighters injured, Saturday night.

Lopez said they are still investigating the cause of the fire.

"It was just like one giant fireball that went up", the guest told the Long Beach Press-Telegram.

The injuries of the four people hurt in the underground electrical vault explosion were described as minor, an official said.

Firefighters were called to the scene for a reported electrical fire.

Southern California Edison crews, working overnight, replaced three damaged transformers, which initially cut power to as many as 1,700 customers.

Fire officials say among those who were injured were patrons of the shopping and dining complex and fire personnel, the newspaper reports.

While a heavy presence of fire and police personnel tended to the injured, hundreds of others attending an Oktoberfest event evacuated the area.

Witness Kyle Nelson told a local television station that he heard and saw three large explosions in rapid succession coming from the festival, according to the Associated Press.

Megan Houck, 26, of Long Beach, said that she saw flames come from the floor near a patio area.

Houck stated the flames went nicely above the roof of the village, as much as 40 ft (12 meters) within the air.

Pat Brassil, 27, stated he was exterior one of many Oktoberfest tents when he noticed flames shoot out from one other tent close to the competition's entrance. 'Everyone was going pretty insane and screaming'.

Restaurant patron Dawn Orlow-Townsend told KCAL9 the lights flickered before the explosions and that she could feel the heat through the walls.