Crews on all-terrain vehicles recovered five bodies Monday and searched for five more from the wreckage of a plane carrying members and friends of Hendrick Motorsports, one of NASCAR’s top teams.

Federal investigators said they did not know what caused the Beech 200 King Air to crash Sunday en route from Concord, N.C., to Martinsville Speedway. The crash was on Bull Mountain in the foothills of the Appalachians, about seven miles west of the track.

The crash killed all 10 people aboard, including the son, brother and two nieces of team owner Rick Hendrick.

A bulldozer cleared a path to the crash site so ATVs could recover the bodies, which were to be brought to Roanoke for identification.

“The only method we have of getting up to the scene is on ATVs, all terrain vehicles, so it’s a tedious and slow process,” State Police Sgt. Rob Carpentier said.

The cause of the crash was not immediately known, but it happened in rough, hard-to-reach terrain in weather described as “extremely foggy” by Dale Greeson, who lives about a mile from the site.

National Transportation Safety Board investigator Brian Rayner said there was no indication that the plane had a flight data or cockpit voice recorder. He said the aircraft struck a steep slope and wreckage was confined to an area about 200 feet long.

Hendrick driver Jimmie Johnson’s victory celebration after the Subway 500 in Martinsville was halted as news of the deaths filtered through the Hendrick team, which also includes drivers Jeff Gordon, Terry Labonte and Brian Vickers.

Rick Hendrick, 53, had not gone to the race because he wasn’t feeling well, a team spokesman said.

Hendrick employs 460 workers at its Charlotte, N.C., compound, which includes race shops and a 15,000-square-foot museum and team store.