The bodies of a husband and wife were discovered at a farmhouse in Dunkeswell.
The couple have been named locally as Michael and Nicola Beck - police haven't confirmed their identities.
Officers have been conducting house-to-house enquiries and post mortems are due to be carried out.
The former farmhouse had been up for sale recently for over a million pounds.
Mr and Mrs Beck also had a home in the Chelsea area of London.
Torquay big wheel will 'lift the spirits' for years to come
Planners unanimous despite heritage harm concerns
Investigations underway following fire in Devon village
Crews were called to Burlescombe
10,000 new homes could come to Plymouth
Government officials attend cabinet meeting
Decision soon on Torquay town centre redevelopment
More than 100 new homes will be built
Flights between Exeter and Amsterdam underway again
Daily flights to Netherlands after five years
Man kicked unconscious in Plymouth
Two teenagers arrested
