Police, protesters going back-and-forth for control over Kiev

Ukrainian protesters cheer after the latest molotov cocktail sets a riot police officer on fire.

Ongoing clashes continue to leave Kiev choking in tear gas while protesters and police battle for control.

At least three demonstrators have been killed -- two of them from gunshot wounds.

Prime Minister Mykola Azarov blames the unrest on far-right rebels and radicals.

(SOUNDBITE) (Ukrainian) UKRAINIAN PRIME MINISTER MYKOLA AZAROV, SAYING:

"Organized far-right rebels and a radical part of the protest caused mass unrest in central Kiev, attacking police using cold steel arms and explosive substances, setting vehicles and buildings on fire."

So far more than 150 police have been injured. It's unknown how many protesters have been hurt.

Azarov ordered police to investigate the deaths and crack down on certain protesters.

(SOUNDBITE) (Ukrainian) UKRAINIAN PRIME MINISTER MYKOLA AZAROV, SAYING:

"Participants of this unrest cannot be called pea