Putin warns Biden sanctions will be a 'colossal mistake' and threatens to SEVER ties
US president urges Russian leader to 'de-escalate' during high-stakes phone call and says West will 'respond decisively' if he 'further invades' Ukraine
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Both sides threatened consequences if Ukraine crisis is not resolved quickly
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Biden and Putin talked by telephone for 50 minutes on Thursday afternoon
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The Russian president said new sanctions would lead to the complete breakdown in relations between Washington and Moscow, said the Kremlin
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Russia has deployed almost 100,000 troops close to the border with Ukraine
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Putin says he wants guarantees that Ukraine will not be admitted to NATO
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Earlier it emerged that a US spy plane had been spotted over eastern Ukraine
https://www.dailymail.co.uk/news/article-10356959/Biden-calls-Putin-Delaware-home-Air-Force-flew-SECOND-spy-plane-Ukraine.html