1. Thousands of riot police clashed with protesters Tuesday in Ukraine's capital, Kiev.
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AP Photo/Efrem Lukatsky
3. At least 22 were killed and hundreds of others were injured.
AP Photo/Efrem Lukatsky
Anti-government protesters carry a wounded policemen during clashes with riot police.
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David Mdzinarishvili / Reuters
An injured man is helped by anti-government protesters during clashes with riot police.
5. It was the deadliest day in nearly three months of protests against the government.
AP Photo/Sergei Chuzavkov
6. The protests began in November after President Viktor Yanukovych accepted a $15 billion bailout from Russia to back out from a deal with the European Union.
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David Mdzinarishvili / Reuters
8. Opposition leader Vitali Klitschko urged protesters to defend Kiev's Independence Square, where they were located.
AP Photo/Efrem Lukatsky
9. "We will not go anywhere from here. This is an island of freedom and we will defend it," he said.
AP Photo/Sergei Chuzavkov
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Ukranian riot police take cover behind their shields during clashes with anti-government protesters.
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AP Photo/Sergei Chuzavkov
13. Protesters fought back police with rocks, bats, logs and homemade bombs.
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David Mdzinarishvili / Reuters
An anti-government protester throws a log during clashes with riot police.
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Vasily Fedosenko / Reuters
An anti-government protester prepares to throw a petrol bomb.
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Vasily Fedosenko / Reuters
An anti-government protester prepares to throw an molotov cocktail during clashes with riot police.
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Vasily Fedosenko / Reuters
Fireworks explode near anti-government protesters during clashes with riot police.
21. Despite the protests, President Yanukovych remains popular in the southern and eastern portions of the country, where ties to Russia are strong.
AP Photo/Sergei Chuzavkov
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AP Photo/Sergei Chuzavkov
23. According to the Associated Press, Russia "may have wanted to see Kiev remain calm through the Winter Olympics in Sochi, so as not to distract from President Vladimir Putin's games."
AP Photo/Sergei Chuzavkov
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Vasily Fedosenko / Reuters
An anti-government protester throws bottles during clashes with riot police.
26. "We see that this regime again has begun shooting people; they want to sink Ukraine in blood. We will not give in to a single provocation," opposition leader Arseniy Yatsenyuk said.
Vasily Fedosenko / Reuters
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AP Photo/Efrem Lukatsky