Workers were building a bridge Thursday so vehicles could get to the remote, swampy site of a jet cargo plane crash that presumably killed eight people, officials said.

Four bodies have been removed from the wreckage of the C-141B Starlifter plane that went down on a military reservation in the Florida Panhandle, said Staff Sgt. Robert Pfenning, a spokesman at Norton Air Force Base at San Bernardino, Calif., where the plane departed Monday.Meanwhile, a special Air Force panel was to open an investigation Wednesday of the Monday evening crash at the Eglin Air Force Base Reservation.

Victoria Hanson, a spokeswoman at Hurlburt Field, said more than 100 workers were building the bridge Wednesday. "This should speed up removal of the bodies," she said.

Air Force civil engineers worked through the night to build a half-mile dirt road to the site.

The swampy terrain, thick brush and a series of thunderstorms Tuesday hampered rescue and recovery efforts. Helicopters, bulldozers and bridge-building equipment were used.

The plane went down about four miles north of Hurlburt during its final approach.

Pfenning identified the plane's crewmen were Capt. Mark J. Chambers, 30; Capt. John F. Young, 30; Master Sgt. Robert E. Wright Jr., 37; Tech. Sgt. Ronald D. Grubbs, 29; Staff Sgt. Karl M. Kohler, 32; Airman 1st Class Scott D. Craig, 22; and Staff Sgt. John W. Remerscheid, 33.

The eighth man was identified as retired Air Force Capt. John G. Galvin of Jacksonville. Hanson said Galvin boarded during a refueling stop in Colorado.