A burned house in Welcome Bay is being treated as a crime scene.
Police, fire investigators and a fire crew were at the secluded Waikite Rd property this morning.
The house is down a valley, surrounded by well-established trees and bushes at the end of a right-of-way and steep driveway about halfway up Waikite Rd.
A detective at the scene would not comment on the investigation.
The first of three fire crews arrived at the house, already well ablaze, about 10.30pm on Sunday.