Federal authorities say the small plane that crashed into a building in downtown Anchorage, Alaska, belongs to the Civil Air Patrol.

But Clint Johnson, Alaska region chief for the National Transportation Safety Board, says there were no sanctioned flights when the plane crashed early Tuesday.

The Civil Air Patrol is a civilian auxiliary of the U.S. Air Force, made up of volunteers who help in search and rescue missions.

Karen Bowen, a bookkeeper who answered the phone at the group's office, relayed instructions from the group's commander that the crash is under investigation. A message was left for the volunteer commander, who wasn't in the office.

Johnson says there were blustery winds when the plane clipped the corner of an office building and then crashed into the side of an adjacent commercial building. But he says nothing is being ruled out as a cause.