Bones were dug up at a Washington state construction site by detectives investigating the discovery of a severed foot.

Kitsap County sheriff's spokesman Scott Wilson says the bones uncovered Monday have been turned over to forensics specialists with the King County medical examiner's office.

Authorities believe they are human bones.

The burial site was indicated by cadaver dogs brought in to help search, after a foot was found Saturday in a boot at the south Kitsap County construction site.

The Kitsap Sun reports sheriff's detectives and investigators from the Kitsap County coroner's office and State Patrol crime lab have been digging slowly and carefully to preserve any evidence.