A bright light that streaked across the night sky in Los Angeles Saturday night had people gasping from Hollywood to Long Beach.

Amazed skywatchers—some as far away as Scottsdale, Arizona and Las Vegas, Nevada— saw what looked like a blue spotlight and promptly took to social media to freak out. But the light source was far from otherworldly. It was caused by a military exercise off the California coast, a Coast Guard spokesperson told Mashable after receiving a number of frantic calls. The Navy was testing rockets in the waters off Point Mugu Naval Air Station.

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