The bodies of a man and two young children have been discovered near a car on a bridleway in Hampshire, police have revealed.
Detectives from Hampshire Constabulary's major crime investigation team are investigating the deaths.
The bodies have not yet been formally identified but police say they are believed to be those of Michael Pedersen, 51 of Chertsey, Surrey, Ben Pedersen, seven, and Freya Pedersen, six, both of Ashford, Middlesex.
All three bodies were found on a bridleway in the hamlet of Newton Stacey, Andover, at around 6.15pm on Sunday by a member of the public.
The coroner has been informed and postmortem examinations are due to take place.
Detective Superintendent Tony Harris, said: "We are currently investigating the circumstances surrounding this terrible incident and are working to establish what has led to these tragic deaths.
"We are treating this as an isolated incident and we do not believe anyone else was involved.
"The families of Michael, Ben and Freya have been informed and specialist family liaison officers from Hampshire Constabulary, and officers from Surrey police, are working with them to provide support and keep them updated as the investigation progresses.
"Our thoughts are with the family and friends of those involved at this extremely difficult time and I would ask that they be allowed to come to terms with what has happened in a dignified and respectful way."