Colorado National Guard officials say a helicopter was forced to make an unscheduled landing today during a standard training mission in Eagle County.
Officials say the UH1 "Huey" developed some sort of mechanical problem.
Guard spokesman 2nd Lieutenant Darin Overstreet says no injuries have been reported among the four crew members on board, but he says they are undergoing routine medical reviews.
Overstreet says a second helicopter picked up the crew after what he called a precautionary landing about 14 miles west of Eagle.
The helicopter was on a mission from the Guard's High Altitude Army Aviation Training Site, where the Guard trains helicopter pilots from all over the world in flying in mountainous areas.