Here is how a bloody day unfolded on Thursday in Ukraine, marked by an escalation of clashes between anti-government protesters and riot police in which the opposition says at least 60 died.

Towards 0600 GMT (8am local time): Hundreds of armed protesters brandishing sticks, paving stones and petrol bombs charge riot police barricades.

They push back the police, who respond with rubber bullets, tear gas and kalashnikovs, to retake control towards 0730 GMT of Kiev's iconic Independence Square, which they have occupied for the past three months.

0900 GMT: After talks with opposition leaders, the foreign ministers of France, Germany and Poland begin a meeting of several hours with Ukrainian President Viktor Yanukovych.

1000 GMT: Top officials are evacuated from Ukraine's main government building.

Ukraine's three main opposition leaders call fresh violence "a provocation" by the pro-Russian government in a joint statement.

Towards 1145 GMT: The interior ministry advises Kiev residents not to venture outdoors, where live ammunition is being used.
Kiev's mayor resigns from Mr Yanukovych's ruling Regions Party in protest over the "bloodshed".

1200 GMT: During a news conference in Baghdad, Russian Foreign Minister Sergei Lavrov accuses Ukrainian "extremists and hardliners" of seeking to spark a "civil war". He condemns threatened sanctions against Ukrainian officials as an "attempt at bullying".

1400 GMT: The interior ministry says in a statement police used live munitions in self-defence. Police claim a sniper has wounded 20 officers by firing live ammunition from the window of a building overlooking the square.

1440 GMT: The Kremlin announces it is sending a representative to Kiev at the request of Mr Yanukovych to act as a mediator in talks with the opposition.

A medic who works with the opposition says more than 60 protesters died from gunshot wounds on Thursday.

1500 GMT: The interior ministry says protesters have seized 67 police officers.

1600 GMT: Kiev city authorities say that at least 67 demonstrators have been killed in two waves of violence between protesters and riot police that first broke out on Tuesday.

The White House says it is "outraged" that Ukrainian forces had turned automatic weapons on demonstrators.

1630 GMT: The trio of EU foreign ministers and Mr Yanukovych discussed a possible "roadmap" out of the political turmoil, a German delegation source says, saying the ministers have extended their stay to Friday to continue negotiations.

1700 GMT: The EU agrees to impose a travel ban and asset freeze on Ukrainians with "blood on their hands", Italian Foreign Minister Emma Bonino says after a crisis meeting in Brussels.

1850 GMT: Polish Prime Minister Donald Tusk says Mr Yanukovych told EU envoys he is willing to hold early elections in 2014.

1930 GMT: No deal has yet been reached to end the violence, opposition leader Vitali Klitschko and a French diplomatic source say, after hours of talks.

The three EU envoys are due to meet Mr Yanukovych again imminently.

1950 GMT: German Chancellor Angela Merkel and US President Barack Obama join with Russian President Vladimir Putin to call for an urgent political solution.