Kyrgyzstan's interim government yesterday said it had charged ousted President Kurmanbek Bakiyev with mass killings and asked Belarus to hand him over for trial.
"He has been charged according to two articles - murder of more than two individuals and abuse of power," said the interim government's deputy leader, Azimbek Beknazarov.
"We have a basis for him to be extradited."
Mr Bakiyev, who was toppled amid violent protests against widespread corruption and rising utility prices in the Central Asian state earlier this month, has been granted sanctuary by Belarus President Alexander Lukashenko.
"We will soon send a request to Minsk for his extradition," Mr Beknazarov said.
He said that in line with regional conventions "Belarus is obliged to hand him over".
The interim Kyrgyz government has previously said Mr Bakiyev was wanted in connection with the shootings of demonstrators during the unrest that culminated in his overthrow. More than 80 people died in the protests.
Mr Beknazarov added that extradition requests were also being issued for other top officials of Mr Bakiyev's ousted government who have been charged with "mass killings", though he did not give details on their whereabouts.
"Members of ex-President Kurmanbek Bakiyev's entourage are accused of mass killings," he told reporters.
"They are the ex-Premier Daniar Usenov; Bakiyev's brother, the former security services' chief Murat Sutalinov; and his deputy, the President's son Marat Bakiyev."
Russia has already extradited the former Kyrgyz ex-Interior Minister, Moldomus Kongantiyev, who vanished amid reports that he had been beaten to death in the protests that swept the authorities from power.
There have also been public calls for Mr Bakiyev to stand trial for polygamy charges after he fled Kyrgyzstan along with his second wife and their two children - previously kept out of the public eye.
"The ex-President violated article 153 of the Kyrgyz criminal code since he is married to several wives at once," said Kalicha Umuralieva, who heads the Bishkek-based NGO Our Right, which has called for the polygamy probe.
"Our foundation intends to set a precedent and call for criminal proceedings... Bakiyev's polygamy was well-known, it is now up to investigators to establish how many wives he had," she said.
Mr Bakiyev is officially married to Tatyana Bakiyeva, an ethnic Russian with whom he has two children, Maxim and Marat.
But he is widely rumoured to have married again more than once - a practice outlawed in the ex-Soviet but predominantly Muslim republic.