Authorities say 'intentional detonation' triggered explosion at California medical building

Authorities say 'intentional detonation' triggered explosion at California medical building

Authorities said they are still trying to figure out what happened and wouldn't comment on whether the incident could be related to a gas leak or explosive devices.

ALISO VIEJO, Calif. (AP) - An explosion that rocked a Southern California medical office building on Tuesday, killing a woman and injuring three other people, is being investigated as intentional and investigators believe the blast may have come from a package, a USA official told The Associated Press. The FBI also said there was no indication of terrorism, but it would continue to investigate out of caution. The person who died was inside the building when the blast occurred.

Bomb technicians from the Orange County Sheriff's Department, the Federal Bureau of Investigation and other agencies were investigating, said Paul Delacourt, the assistant director in charge of the FBI's field office in Los Angeles. Dave Sawyer said Tuesday night that the size of the explosion makes it suspicious.

According to the Orange County Fire Authority, the explosion occurred on the first floor.

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Officials declared a second-alarm fire and hazmat situation, and crews successfully extinguished a fire at the building after the explosion.

McWilliams says she saw two women covered in ash and soot stagger out of the building. The extent of their injuries is not yet known.

The fire at the building at 11 Mareblu was quickly doused following the roughly 1:10 p.m. explosion. All were taken to a hospital, she added.

There was a daycare located across the street from the building with the explosion, but officials confirmed no children were injured and they were working to reunite the kids with their families. No children were injured, officials said.

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