BBC - Kiev reports three Russian tanks have entered east Ukraine. Quote:
Mr Avakov said the tanks had crossed the border from Russia along with armoured personnel carriers and artillery pieces in the Dyakove area of Luhansk region, before moving into the neighbouring Donetsk region.
There, Ukraine's interior minister said, the tanks headed for the town of Snizhne on Thursday morning. Two then proceeded to the town of Horlivka and were attacked by government forces.
"The fight is under way," Mr Avakov said. "I cannot say about its final outcome, but part of this column has been destroyed."
Unverified video has been posted on YouTube of a battle tank rolling down a street said to be in Snizhne. The footage was shot from a flat overlooking the street.
No reaction yet in gold.