Ukraine: government troops move against pro-Russian separatists - live updates
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- Ukrainian troops move into Slavyansk and Donetsk
- Obama warns of new sanctions
- Russia says Geneva deal 'to be implemented in steps'
- Read a summary of key events so far

The Russian mobilization: Many photographs and video (here andhere, via The Interpreter live blog) are emerging of moving tanks, armoured personnel carriers and other materiel in what is said to be the area of Novoshakhtinsk, just on the Russia side of the eastern Ukraine border. The Guardian has not independently confirmed the veracity of the images, which come from multiple sources and were uploaded at around the same time. The Russian military buildup on the border has been going on for weeks. Here's an example from today via BBC Russian correspondent Olga Ivshina: Full Story>>>