Latest News Wires Mysterious explosion and daylight fireball in Nevada, California skies (+video)

A loud explosion and a streak of light occurred over roughly a 600-mile line across Nevada and California. It was probably a meteor, say astronomers.

(AP Photo/University of Wisconsin-Madison Department of Atmospheric and Oceanic Sciences)

A loud explosion heard across much of Nevada and California on Sunday morning rattled homes and prompted a flood of calls to law enforcement agencies on both sides of the Sierra Nevada, some reporting fireball sightings.