A protester is dead in Kiev as new clashes break out between protesters and police.
Witnesses say the demonstrator was shot by police.
Protesters shouted "Murderers!" and "Glory to Ukraine!" in a square in the centre of the capital Kiev after reports spread that a man had been shot dead by a police sniper.
The latest clashes broke out when police, using teargas, tried to dismantle a protest camp but were repelled by demonstrators hurling home-made petrol bombs, witnesses said.
The demonstrators have been out in the street for several weeks, angered by President Yanukovich's decision to shun a trade pact with the European Union and instead accept financial aid from Russia.