More than 1,000 Kyrgyz troops and police evicted protesters from the main government building they had seized earlier today.
Witnesses police drive the protesters - who were demanding their candidate be allowed to run in presidential elections next month - out of the building in the capital Bishkek and chase them through nearby streets, shooting in the air and firing tear gas.
The situation remained tense and a little later about 500 protesters again gathered outside the building facing several hundred police.
Nearby another crowd of about 500 protesters formed a line on the main Chu Avenue, which runs by the main square next to the government building, whistling and jeering at police.
It was the latest sign that the central Asian state of five million remains volatile. President Askar Akayev was ousted in March in a coup when crowds of protesters seized the same building after a rigged parliamentary election.
Acting President Kurmanbek Bakiyev, the election frontrunner, was away from the capital at the time.
Parliament later called an emergency meeting to discuss the situation, which will be attended by
Mr Bakiyev and acting first deputy prime minister Felix Kulov, parliamentary sources said.
Mr Bakiyev has been in office since April after the coup that ousted the previous government. He is due to run in the July election.