President Viktor Yanukovych, who was still engaged in talks with opposition leaders and foreign officials, was "going to make concessions in order to restore peace," Interfax Ukraine quoted his spokeswoman Anna German as saying.
Support for the president appeared to be weakening, as reports said the army's deputy chief of staff, Yury Dumansky, was resigning in "disagreement with the politics of pulling the armed forces into an internal civil conflict."
Late yesterday, the Ukrainian parliament passed a measure that would prohibit an "anti-terrorist operation" threatened by Yanukovych to restore order, and called for all Interior Ministry troops to return to their bases.
Today morning, several thousand protesters milled around Independence Square, known as the Maidan, which earlier this week was rocked by street battles between protesters and police that have left at least 101 dead.
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No visible police forces remained on the square, and volunteers walked freely to the protest camps to donate food and other packages.
Yanukovych and the opposition protesters are locked in a battle over the identity of Ukraine, a nation of 46 million that has divided loyalties between Russia and the West. Parts of the country, mostly in its western cities, are in open revolt against Yanukovych's central government, while many in eastern Ukraine back the president and favour strong ties with Russia, their former Soviet ruler.
In Brussels, the 28-nation European Union decided in an emergency meeting yesterday to impose sanctions against those behind the violence in Ukraine, including a travel ban and an asset freeze against some government officials.
The White House said US Vice President Joe Biden spoke by telephone with Yanukovych yesterday afternoon and made clear that the US is prepared to sanction those officials responsible for the violence.
"The price of freedom is too high. But Ukrainians are paying it," Viktor Danilyuk, a 30-year-old protester, said yesterday. "We have no choice. The government isn't hearing us.