According to CNN affiliate KCAL, freeze warnings were expected to be in effect through 9 a.m.

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"I know that she wrestled with some addictions, " said Andrea Diamond, a friend and neighbor, in an interview with KCAL-TV.

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The quake's epicenter was two miles northwest of Devore, California, where residents told CNN affiliate KCAL that their homes shook, without damage, authorities said.

CNN: Earthquake registering 3.8 strikes southern California

Long bursts of gunfire broke through the silence, some of it captured by a reporter working for CNN affiliates KCBS and KCAL, on a cell phone.

CNN: Dorner manhunt: A car chase, a gunfight and a fiery cabin