Tanks bearing Russian flag roll into eastern Ukraine as Vladimir Putin warns that country is on the brink of civil war
Six armoured personnel carriers move into pro-Russian-held Slaviansk bearing the flag of the Russian Federation
Soldier aboard one claims they are from a Ukrainian airborne unit which has defected to the pro-Russian insurgency
Ukrainian army APCs roll into Kramatorsk, scene of fierce fighting between police and militants on Saturday
Forces loyal to Kiev retook an airfield held by separatists just outside that town in an airborne assault last night
Russian President Vladimir Putin tells German Chancellor Angela Merkel that Ukraine is on the brink of civil war
He denied any involvement of Russian troops, but Kiev names a Russian regiment it claims is active in east Ukraine

By Will Stewart and Chris Irvine and Damien Gayle

Published: 03:38 EST, 16 April 2014 | Updated: 05:24 EST, 16 April 2014