Two helicopters are searching for four people who were reported injured when their small plane crashed Sunday.
Routt County Sheriff John Warner says a person identified as a passenger called 911 around 1:30 p.m. from a cell phone and said all four people on board had serious injuries, including broken bones.
He said authorities were searching southern Routt County for the plane.
Officials don't know the type of plane or the passengers' hometowns.
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