The head of Russian state-controlled energy company Gazprom warned the European Union there was "not insignificant" risk for Russian gas transit to the EU.
Ukraine's energy minister said Russia had cut off all gas supplies to Kiev this morning. Ukraine had until Monday morning to pay off a £1.1 billion gas debt or have their supplies cut off.
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Police warned people not to approach the 32-year-old if they spotted him.
A witness said that the animals may have been spooked by the sound of a horn.
A fire engulfed much of the landmark building on Friday night.