Five members of an Arizona family were killed when their small airplane crashed and burned on a snowy southwestern Colorado mesa, authorities said Saturday.

The Cessna 421 plane crashed about 11 a.m. Friday on Mesa Verde, outside the national park of the same name. The cause of the crash was under investigation, Federal Aviation Administration spokesman Joseph Catalano said."It's all one family," he said.

The bodies of George Mehl, a Tucson, Ariz., real estate developer, his wife, Deborah, and their daughters, Natalie, 12; Laura, 8; and Jenna, 3; were found at the crash site, state patrol spokeswoman Cammy Devore said.

The family was flying from Tucson to Telluride, Colo. Their plane had already tried once to land at the Cortez Airport and had begun a second try when contact with the plane was lost. It was not immediately clear who was piloting the craft.

The plane crashed at an elevation of 7,700 feet. The wreckage was found about 3 p.m. Friday by a Civil Air Patrol airplane. CAP volunteers and others hiked through waist-deep snow to reach the plane.