There are reports of sporadic gunbattles and looting in Kyrgyzstan's capital, Bishkek.
The reports say the capital was tense as darkness fell Friday, and occasional volleys of gunfire could be heard.
Hours earlier, the parliament appointed former prime minister and opposition leader Kurmanbek Bakiyev acting head of state, a day after after protesters took over the seat of the government.
The new leader has chosen mostly prominent opposition figures for the posts of foreign, defense and finance ministers and chief prosecutor. For the job of interior minister, he picked Myktybek Abdyldayev, a former chief prosecutor who had been fired Wednesday by ousted President Askar Akayev.
Russia became the first country to express its support, but the ousted President Akayev, who fled Thursday, condemned his ouster as an "unconstitutional coup."
Some information for this story provided by AFP and Reuters.