Authorities who have spent the past three weeks searching in the mountains of Washington state for an ex-soldier wanted in the deaths of his three young daughters say there is no evidence that he remains in the area or that he is alive at all.

Authorities say they believe they spotted Travis Decker, an ex-soldier wanted in the deaths of his three daughters, in the remote backcountry of Washington state, after receiving a tip from hikers who said they saw a lone person who appeared to be ill-prepared for the conditions.

Authorities say blood discovered at a campsite where three young Washington state sisters were found dead last week belonged to a male.

Authorities have closed a wide swath of popular campgrounds and backpacking areas along the Pacific Crest Trail in Washington as they search for a former Army soldier wanted in the deaths of his three young daughters.