Devon and Cornwall Police has confirmed that a woman and her elderly parents have died of suspected carbon monoxide poisoning at a caravan park in Camborne.
Officers say the alarm was raised at just before 1pm after the couple's helper was unable to reach them.
Firefighters visited the static caravan at Tremarle Home Park and recovered the bodies of three people and a dog from inside.
More top news
A service to remember 'Operation Dynamo', the code name for the mass evacuation of allied troops in 1940, will take place on the beach.
The Bank of England has launched a secret project looking at the economic risk to Britain if the country votes to leave the European Union.
The actress and The Only Way Is Essex star Mark Wright will become husband and wife over the Bank Holiday weekend.