SEATTLE (AP) — 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.