LARIMER COUNTY, Colo. Two people were killed and a third person seriously injured after a single-engine plane crashed into the side of Storm Mountain in Larimer County Saturday.As of late afternoon, rescue crews were still attempting to get the injured party off the mountain and into a waiting medical chopper, where they would be airlifted to the hospital. Their condition is not known.The Larimer County Sheriff's Office said crews had to hike several feet amid rough terrain to reach the crash site on the mountain's rocky and wildfire-charred slope. The crash was first reported around noon. RAW: Single-engine plane crashes near Storm Mountain in Larimer CountyVideo of the crash scene shows the single-engine Cessna 172 broken up, with both wings and the nose separated from the rest of the aircraft. Debris can be seen scattered around the crashed plane.The aircraft is owned and operated by the Civil Air Patrol, according to registration information from the plane's tail number. The Civil Air Patrol is a federally chartered non-profit corporation.Data from FlightAware shows it took off from Northern Colorado Regional Airport and appeared to have circled the area several times before crashing. The flight's crew was on a search and rescue training exercise, according to CAP.Our deepest sympathies go out to the families, members, and friends affected by this tragic event, said CAP National Commander Maj. Gen. Regena Aye in a statement. Our members serve because they care about Americas communities. Our people are our most important resource, and we are committed to ensuring their safety and security."The Federal Aviation Administration and the National Transportation Safety Board have been notified, and an NTSB team is expected to arrive to investigate the cause of the crash.