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NATO officials estimate there are now well over a thousand Russian troops operating inside Ukraine.  Ukrainian President Petro Poroshenko cancelled a scheduled trip to Turkey today, saying Russian troop had entered his country. 

The Ukrainian prime minister is asking the U.S., European Union and G7 countries to freeze Russian assets and finances until Russia withdraws.  A Russian spokesman denied any Russian troops had crossed into Ukraine, despite witness reports of tanks and armored personnel carriers crossing the border. 


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