Dutch public prosecutors have said that their investigation into the death of Slobodan Milosevic showed that he died of natural causes.
Some Milosevic supporters said he had been poisoned
"There is not a single indication that the death was the result of foul play," prosecutors said in a statement.
The former Yugoslav leader, on trial for war crimes, was found dead in his cell in The Hague on 11 March.
Earlier autopsy results showed that Milosevic, who supporters say was poisoned, died of a heart attack.
Soon after his death, a Dutch expert said traces of rifampicin, powerful antibiotic that could have counteracted medication for his heart condition, had been found in his blood in recent months.
However, independent Dutch tests on the body found no trace of drugs capable of causing his death.
The statement said that investigators with the National Forensic Institute had definitely concluded that the cause of death was a heart attack.
"The autopsy uncovered serious heart defects which resulted in the heart attack," the statement said.
Milosevic was believed to have died around 0745 (0645 GMT) that morning, or almost certainly between 0700 and 0900, it continued.
They said guards knocked on his door for a 0900 wake-up, but assumed he was still sleeping and left him alone until 1000 when they found his body in bed.
A Dutch doctor was summoned and confirmed the death at 1030, the statement said.
The International Criminal Tribunal for the Former Yugoslavia (ICTY), where Milosevic was on trial, said in a statement that it welcomed the prosecutor's final findings.
Its own inquiry would focus on the medical treatment given to him while in the tribunal's detention centre, the court said.
The tribunal expects to conclude its investigation shortly.