SEATTLE (AP) — 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.

Exactly what prompted the search to narrow was not made public. The Wenatchee man is accused of killing his three daughters, then vanishing.

The BriefThree Wenatchee girls, ages 5, 8 and 9, were found dead on June 2, a few days after they were reported missing following a visitation with their father, Travis Decker.Authorities are conducting an extensive multi-county manhunt for Decker,

Travis Caleb Decker, 32, is wanted by Wenatchee police on charges, including three counts of first-degree murder and first-degree kidnapping.

Travis Decker's dog has been found as authorities continue to search for the man accused of killing his three daughters.

The search for Travis Decker, accused of killing his three daughters, continues as the Washington National Guard has been deployed.

Officials are urging residents and cabin owners in remote parts of Chelan, Kittitas, King, Snohomish and Okanogan counties to take extra precautions.

The Chelan County Sheriff's Office shared updated photos of the triple murder suspect Travis Decker from "the days leading up to his visitation" with his daughters.