SEATTLE — 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.

Dozens of additional law enforcement officers from an array of agencies joined the investigation and search Friday for Travis Caleb Decker, 32, four days after the girls — 9-year-old Paityn Decker, 8-year-old Evelyn Decker and 5-year-old Olivia Decker — were found dead at a remote campsite outside Leavenworth.

The girls’ mother reported them missing the night of May 30 when Decker failed to return them to her home in Wenatchee, about 100 miles east of Seattle, after a scheduled visit.

The Chelan County Sheriff’s Office said in a statement that there were more than 100 officers involved in the search, which covered rugged terrain in the Cascade Mountains of central Washington, and more than 500 tips had poured in from the public.

— The Associated Press