Residents of Buena Vista, Colo., are in shock after a rock slide on Monday that authorities say killed five people — possibly all from the same family.

The Denver Post says "a deadly cascade of boulders poured over Chaffee County's popular Agnes Vaille Falls [at] midmorning." The rocks came down on a popular hiking trail.

According to Denver's ABC7, "a Chaffee County deputy says a 13-year-old girl who is the lone survivor ... told him her father shielded her with his body as the rocks roared down." Some of the boulders were the size of cars, NBC News says. The site was still too unstable Monday for searchers to reach the bodies. They'll make another attempt Tuesday. But the local coroner, authorities say, was able to get close enough to see the condition of the five victims' remains and is certain they did not survive, NBC adds.

At Buena Vista High School on Monday evening, writes the local Chaffee County Times, "students wept openly" during a gathering in support of the survivor, middle school student Gracie Johnson.

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