Slobodan Milosevic's son has accused the Serbian authorities of blocking his father's burial in the country.
Marko Milosevic arrived at The Hague on Tuesday to collect his father's body, saying he wanted a funeral in Moscow.
Four Russian doctors have also been sent to The Hague to carry out their own autopsy on Milosevic, who died of a heart attack on Saturday.
Serbian President Boris Tadic had said it was up to the family to decide where the burial should be held.
The former Yugoslav leader died in his prison cell at The Hague, aged 64.
He was on trial for alleged war crimes, crimes against humanity and genocide.
Arrest threat
His widow, Mira Markovic, was facing arrest on fraud charges if she returned to Serbia from Russia.
But according to officials from Mr Milosevic's Socialist Party, a court lifted the arrest warrant on Tuesday, allowing her to return and opening the way for a Belgrade funeral.
Mr Tadic earlier told the BBC charges could not be dropped altogether.
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"If the Milosevic family is asking for some abolition [of the charges against Ms Markovic], I am not going to give them abolition, because of the role and responsibility of this family in the recent past," he said.
Before leaving Moscow for the Netherlands, Marko Milosevic said: "The Belgrade authorities do not allow [Milosevic's funeral], they want to avoid it.
"As far as I know Moscow Mayor Yuri Luzhkov agreed yesterday" to allow the funeral.
It is thought the family hope any burial in Moscow would be a temporary measure, and that Milosevic may be returned to his homeland in the future.
The BBC's Chris Morris in Belgrade says Marko's words suggested he was unhappy with the deal under which his mother was being allowed back to the city, and may have been trying to put more pressure on Serbia.
Belgrade is furious at the turn of events, and would be relieved if Slobodan Milosevic's body was taken to Russia, avoiding the difficulties of a Belgrade funeral, our correspondent says.
Poison fear
Russia said it was sending four of its own doctors to The Hague to carry out a second autopsy, saying it did not trust the tribunal's version.
Top heart specialist Leo Bokeria said he believed the correct medical examinations could have prevented Milosevic's death.
"It's a great regret that they did not heed our numerous appeals for an examination," he said, referring to the tribunal's refusal to allow Milosevic to go to Moscow for medical treatment in the months before his death.
MILOSEVIC TRIAL FACTS
Full results from the tribunal's autopsy are awaited, but a toxicologist who found traces of drugs in Mr Milosevic's blood two weeks before his death said they may have neutralised treatment for his heart conditions.
The findings have not been confirmed, but have raised questions over what caused Milosevic's heart attack.
Before his death, Milosevic alleged in a letter that he was being poisoned. A request to travel for medical treatment to Russia, where his wife and son live, was turned down.
But the Dutch doctor who says he discovered the drugs said he believed Milosevic may have taken them deliberately.
The international war crimes tribunal said Milosevic received competent medical supervision.
The Milosevic case was declared closed at a final hearing by the tribunal on Tuesday.
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