With the death toll already at 50 and rising in two days of violence, clashes in Kiev, Ukraine, show no signs of slowing down, despite President Viktor Yanukovych's announcement of a truce on Wednesday evening. Though the protests have persisted for nearly three months, the bloodiest days of unrest have come this week after both Russia and the European Union maneuvered to further influence the former Soviet state.

A multitude of videos circulating the Internet show the outrageous levels of violence in the Ukrainian capital. In one video from Radio Svoboda, Radio Free Europe's Russian service, a riot policeman with an unmistakable AK-47 assault rifle fires off the screen.

The video then cuts to footage of a sniper in the prone position, flanked by other police. Eventually, they all scamper out of frame.

In a Sky News video, another riot police officer fires his AK-47 as he retreats down a street.

It's unclear what he's firing at, though the news anchor suggests some sort of "firework" went off above the police.

 Ukraine's opposition leaders signed an EU-mediated peace pact with President Viktor Yanukovich on Friday, winning a raft of concessions in a delicate deal to end violence that killed at least 77 people and turned the capital into a battle zone.

By nightfall, opposition leaders who signed the deal were addressing peaceful crowds from a stage in Independence Square, which for the past 48 hours had become an inferno of blazing barricades, where protesters were shot dead by police snipers.

But the crowd was still defiant, holding aloft open coffins of slain demonstrators and making speeches denouncing the opposition leaders for shaking hands with Yanukovich.

If it holds, the deal - hammered out with the mediation efforts of the foreign ministers of France, Germany and Poland - would mark a victory for Europe in a tug-of-war with Moscow for influence in the divided ex-Soviet state of 46 million people.

But it remains to be seen whether violence can be halted and whether a lurch away from Moscow will cost Ukraine a $15 billion Russian financial lifeline it needs to stave off bankruptcy.

Under pressure to quit from mass demonstrations in Kiev, Russian-backed Yanukovich agreed to create a national unity government, change the constitution to reduce his powers and leave office early for new elections.

"There are no steps that we should not take to restore peace in Ukraine," the president said in announcing his concessions before the agreement was signed. "I announce that I am initiating early elections."

Within hours, parliament voted to revert to a previous constitution slashing Yanukovich's prerogatives, sacked his interior minister blamed for this week's bloodshed and amended the criminal code to pave the way to release his rival, jailed opposition leader Yulia Tymoshenko.

EU leaders and the White House praised what European Council President Herman Van Rompuy called a "necessary compromise". Moscow made grudging comments that fell short of endorsing the deal. The European envoys signed the document as witnesses, but a Russian envoy did not.

That envoy, Vladimir Lukin, acknowledged that Moscow had fallen behind the EU in the latest diplomacy: "The EU representatives were in their own way trying to be useful, they started the talks.

"We joined the talks later, which wasn't very right. One should have agreed on the format of the talks right from the start," Lukin was quoted as saying by Interfax news agency.