Paradise (US) Nov 16 (AFP) The number of people listed as missing in one of California's deadliest wildfires skyrocketed to 631, authorities said Thursday, as the remains of seven additional victims were found by rescuers.

Butte County Sheriff Kory Honea said the number of missing had more than doubled during the day as investigators went back and checked emergency calls made when the fire broke out a week ago.

"I want you to understand that the chaos we were dealing with was extraordinary," he told journalists, in explaining the staggering new number. (AFP)

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