Deposed Kyrgyz President Kurmanbek Bakiyev has written a formal letter of resignation, a source in the interim government said.
The source said Bakiyev submitted his resignation before leaving the country, but there has been no official confirmation of the report.
Earlier on Thursday, the Kazakh Foreign Ministry confirmed that Bakiyev had arrived in Kazakhstan to hold talks with Kazakh President Nursultan Nazarbayev.
Kyrgyzstan's interim government said it had allowed the deposed president to leave the country for his own safety.
At least 80 people were killed and more than 1,500 injured during violent opposition protests, which broke out on April 7. Bakiyev fled the capital and an interim government was formed under the leadership of Roza Otunbayeva.
Otunbayeva said the former president, who had been hiding in his traditional stronghold in the country's south, became "a destabilizing factor" in the society.
"Amid popular anger, the interim government had no opportunity to provide safety for the former president, as is required by law [...] We also thought about the image of Kyrgyzstan, its people and its government; [an image] of a civilized country, which does not allow medieval-style punishment of a former president," Roza Otunbayeva said.
She added that international organizations and world leaders had repeatedly asked that the interim government prevent the lynching of the former president.
"None of Bakiyev's supporters and relatives, who stayed with him until the end, will be allowed to leave the country. Those who committed crimes will soon be detained and tried," she said.
The Russian president's press service said Russian troops ensured Bakiyev's safety during his flight to Kazakhstan.
BISHKEK, April 15 (RIA Novosti)
