Three young sisters in Washington—Paityn (9), Evelyn (8), and Olivia Decker (5)—were found dead after going missing during a scheduled visitation with their father, Travis Decker.

Their father’s vehicle was found abandoned near Rock Island Campground, but he remains missing and is wanted for three counts of first-degree murder and one count of kidnapping.

Authorities warn that Decker, a former military member, may be armed and dangerous, ABC News has reported.

The search is ongoing, and police urge anyone with information to call 911.

Written by B.C. Begley