The body of a man, found alongside the bodies of two children, was discovered by his landlord, police have confirmed.
A major investigation is under way following the three deaths in Tidworth, Wiltshire.
Officers say that although they are not looking for anyone else in connection with the incident, they are treating it as suspicious.
Since the alarm was raised, police have been trying to piece together the last movements of the man and the two children, who are believed to be his young sons.
Detective Chief Inspector Ian Saunders, who is leading the investigation, described the case as "very tragic". He said: "The flat was set to become vacated, and as the landlady came to the property that is when she saw what she did.
"Police were then called and discovered the bodies of a 36-year-old man and two male children - aged 11 and 3. At this stage we have not yet formally identified the deceased. But I can say that we are not looking at any third party involvement."
Following the discovery at Auchinleck House, Sidbury Heights, police closed off the scene and conducted door-to-door inquiries.
One key piece in the jigsaw is the results of the post-mortem examinations. Morticians in Bristol will examine the man, while their colleagues in Southampton will carry out tests on the children.
A specialist team of officers have also been assigned to support family members. Among them is the boy's mother - who is said to have separated from their father.
News of the tragedy has sent shockwaves through the rural village and particularly its Sidbury Heights estate - which is home to many families. Neighbours have continued to leave flowers, soft toys and messages of condolence outside the building's main entrance.