Bodies of anti-government demonstrators lay amid smoldering debris after masked protesters hurling Molotov cocktails and stones forced gun-toting police from Kiev's iconic Independence Square -- the epicentre of the ex-Soviet country's three-month-old crisis.
The retreating police unleashed a hail of rubber bullets on protesters as plumes of acrid smoke billowed into the air amid the explosions of stun grenades.
The lobby of the Ukraina hotel overlooking the square was turned into an impromptu morgue. Bodies of seven dead protesters lay side by side under white sheets on the marble floor in front of the reception desk.
The main government building nearby was evacuated while lawmakers ended a session of parliament early after the violence.
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Ukraine's three main opposition leaders called the unrest a "planned provocation" by the pro-Russian government while Moscow blamed it on "extremists and hardliners" who were bent on sparking a civil war.
The clashes left in tatters a truce that Ukrainian President Viktor Yanukovych had called late Wednesday in response to a spurt of violence that killed more than two dozen people in less than two days.
The US State Department has already announced travel bans on about 20 senior government figures over fighting that killed at least 28 people on Tuesday.