Image: 9NEWS

Seven people have been found dead at Margaret River in Western Australia in a suspected murder-suicide.

Four children and three adults were found by police at a rural property in Osmington in the state’s south-west.

Two firearms were also located at the scene.

Macquarie Media’s 6PR in Perth is reporting it’s believed to be a murder-suicide.

Detectives from the major crime squad are travelling to Margaret River from Perth.

Image: 9NEWS

WA Police Chief Commissioner Chris Dawson says it’s a “devastating tragedy”.

“This devastating tragedy will no doubt have a lasting impact on the families concerned, the whole community, and in particular, the local communities in our south-west.”