SEATTLE (AP) — Federal, state and tribal officials are attempting to track a large dock that was reported drifting off the coast of Washington state, one of potentially hundreds of objects that could wash up along the West Coast from the tsunami that struck Japan last year.

The object has not been relocated or confirmed since it was initially reported Friday by fishermen, Keeley Belva, a spokeswoman with the National Oceanic and Atmospheric Administration, said Monday.