California office building shooting leaves four dead, including child

Amat had no details about the confrontation, what may have sparked the attack, or why a child may have been at the building at 202 W. Lincoln Ave.

Signs outside indicated a handful of businesses were located there, including an insurance office, a financial consulting firm, a legal services business, and a phone repair store.

Representative Katie Porter, a California Democrat whose district includes the city of Orange, said on Twitter that she was deeply saddened by reports of the shooting.

"I'm continuing to keep victims and their loved ones in my thoughts as we continue to learn more. My team and I will continue to monitor the situation closely," she tweeted.

A Facebook livestream, posted by a resident who lives near the office building, showed officers carrying a motionless person out and providing aid to someone else, the Orange County Register reported.

"The livestream also showed officers taking two handguns from someone who was lying on the ground and providing help to another person. Two other people were led away in handcuffs," the paper said.

Amat said the shooting was the worst in the city since December 1997, when a gunman armed with an assault rifle attacked a California Department of Transportation maintenance yard.

Arturo Reyes Torres, 41, an equipment operator who had been fired six weeks earlier, killed four people and wounded others, including a police officer, before being shot dead by the police.