Police are still looking for a Washington man they believed murdered his three young daughters one week ago.

Travis Decker, 32, is wanted on kidnapping and first-degree murder charges for killing his daughters aged nine, eight and five, according to the Wenatchee Police Department in Washington state.

Officials believe Mr Decker, who they say is an outdoorsman and may have gone to mountain survival school as part of his military training, is hiding in a remote part of the mountainous and wooded state, making the search for him difficult.

He has been said to "pose a significant risk, if approached". Police have not provided a possible motive.

The girls, Paityn, Evelyn and Olivia, died from apparent suffocation in a remote campground, earlier this week, according to police.