OMAHA, Neb. (AP) — Federal authorities are launching an investigation into the death of a truck driver at an Omaha meatpacking facility.

The federal Occupational Safety and Health Administration said the man was working at a loading dock Thursday at Greater Omaha Packing when he was pinned between two trailers. OSHA spokesman Scott Allen says a preliminary investigation indicates that the brakes were not set on a semitrailer, causing it to move and pin the man. The agency has up to six months to complete its investigation.

Greater Omaha Packing attorney Mark Theisen identified the man as 29-year-old Robert Williams II, of Aurora, Colorado.

The company declined to comment on the OSHA investigation.