A Washington state man is wanted on suspicion of murder after his three young daughters were reported missing and subsequently found dead.

Travis Decker, 32, is wanted on three counts of murder and kidnapping, according to Wenatchee Police. Wenatchee is located about 100 miles east of Seattle.

Police said it was unknown whether Decker was armed. He is a former Army soldier with “extensive training.”

On Friday, the girls’ mother reported that their father did not return them after a planned visit, police said. The girls were aged nine, eight and five.

An image of Travis Decker’s 2017 GMC Sierra bearing the Washington state license plate DCO165C.  (Wenatchee Police Department)

“What prompted her to call us was that … he was late returning the girls and had not communicated to her that he was going to be late, which was his typical fashion and so this was out of the ordinary,” Capt. Brian Chance said.

The sheriff’s office, which located the truck, was leading the search in the Okanogan Wenatchee National Forest area while other teams followed up on “potential credible information and tips” about Decker’s location, the agency said in a statement.

The agency was working with U.S. Marshals to search for Decker. A reward of up to $20,000 was available for information leading directly to his arrest.

“Travis, if you’re listening, this is your opportunity to turn yourself in,” Chelan County Sheriff Mike Morrison said at a press conference Tuesday. “Do the right thing, do what you need to do. And take accountability for your actions. We’re not gonna go away, we’re not going to rest, and we’re gonna make sure we find you. 

The Associated Press contributed to this report.