Scuffles broke out between police and opposition lawmakers, one of whom lay down on the snow trying to block a vehicle from advancing on the camp.
An Orthodox priest sang prayers, and a popular Ukrainian rock song with the lyrics “I will not give up without a fight” blared from loudspeakers over the square. Pop singer Ruslana kept up morale by singing the national anthem and cheering protesters from the stage.
One protester stripped to his waist in the frigid air, got down on his knees and shouted “Stop this ... We are one people!”
At least one tent caught fire after a metal barrel where a fire was burning to keep demonstrators warm overturned.
After some of the barricades and tents were dismantled, police and city workers began to remove debris with bulldozers.
Policemen used what appeared to be chain saws to clear the barricades.
But as the sun rose over Kiev in the morning, the police had not been able to drive back the protesters on the square or to storm the city administration building, where demonstrators poured the building steps with ice to make seizing it more difficult.
There were no police left near the building or on the square by mid-morning, as a crowd of several thousand still lingered on the street.
“They had to leave, there were just too many people here,” said Andrei Govdun, a protester.