The death toll from ethnic violence in Kyrgyzstan's second-largest city, Osh, has risen to 37 amid renewed fighting.
The clashes between Kyrgyz and ethnic Uzbeks flared on Thursday - the worst violence in the country since former President Kurmanbek Bakiyev was overthrown in April.
Many buildings were on fire as fighting spread on Friday. About 500 people have been wounded.
The interim government has declared a state of emergency and deployed troops.
Osh is home to a large ethnic Uzbek community and was the power base of former president Bakiyev.
The cause of the latest fighting is unclear. According to local reports, the violence broke out between rival gangs and developed into gun battles late on Thursday.
Shops were attacked and cars set alight. After a lull, the shooting continued with renewed force on Friday.
The BBC's Rayhan Demytrie in Osh says she drove through ethnic Uzbek districts where residents had written SOS on their homes.
In another Uzbek neighbourhood houses are on fire and people are building barricades, the Reuters news agency reported.
The interim government, which came to power after Mr Bakiyev's removal, has been struggling to impose order in the city ever since.
The leaders of Russia and China have appealed for calm.
The political crisis has raised fears of a civil war in the country, where both Russia and the US have military bases.
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