Kyrgyzstan's interim leader Roza Otunbayeva has said the death toll in the country's worst ethnic violence in decades could be as high as 2,000.
Officials say at least 191 people were killed in fighting between Kyrgyz and ethnic Uzbeks around Osh and Jalalabad.
But Ms Otunbayeva told a Russian newspaper that the real toll could be "10 times the official figures".
Meanwhile, a US envoy in the region has called for an investigation into the unrest.
Central Asia envoy Robert Blake made the call while visiting refugees in camps in the Uzbek border city of Andijan on Friday.
About 400,000 people have fled their homes, with many ethnic Uzbeks crossing into Uzbekistan.
Mr Blake is due to travel later to the capital, Bishkek, for talks with Kyrgyz officials.
