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 believe they spotted the father suspected of the death of his three daughters. Tuesday night, investigators say they believe Travis Decker was seen in the Washington state backcountry. The

Officials said anyone residing in the area or staying in cabins should lock their doors and cars and check footage from cameras.