Ukraine: ‘Full-scale invasion’ by Russia

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Ukraine: 'Full-scale invasion' by Russia

U.S. officials says 1,000 Russian troops have entered Ukraine. CNN's Barbara Starr reports.

01:52 - Source: CNN

Crisis in Ukraine 12 videos

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Ukraine: 'Full-scale invasion' by Russia

01:52

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Some of Ukraine's fighters on retreat

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Ukrainians fight to survive amid siege

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A Russian border guard opens a gate into the Ukraine for the first trucks heading into the country from the Russian town of Donetsk, Rostov-on-Don region, Russia, Friday, Aug. 22, 2014. The first trucks in a Russian aid convoy crossed into eastern Ukraine on Friday, seemingly without Kiev's approval, after more than a week's delay amid suspicions the mission was being used as a cover for an invasion by Moscow.(AP Photo/Sergei Grits)

Questions return with Russian convoy

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Donetsk residents flee Ukrainian chaos

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Ukrainian refugees flee to Russia

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A boy carries pastries in refugee camp near the Russian city of Donets'k, Rostov region, about 15 kilometers from the Russian-Ukrainian border. Some 285,000 people have already fled their homes due to the conflict in east Ukraine, it is estimated, with many leaving for other parts of the country, but close to 168,000 seeking sanctuary in Russia. AFP PHOTO / DMITRY SEREBRYAKOVDMITRY SEREBRYAKOV/AFP/Getty Images

Ukrainian refugees flee to Russia

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