Russian forces have made a sudden thrust into eastern Ukraine near the coal mining town of Dobropillia, a move that may be an attempt to increase the pressure on Kyiv to give up land as the U.S. and Russian presidents prepare to meet.
Ukraine's authoritative DeepState war map showed on Tuesday that Russian forces had advanced by at least 10 km (six miles) north in two prongs in recent days, part of their drive to take full control of Ukraine's Donetsk region.
The advance is one of the most dramatic in the last year, although military analysts said the Russians were using small groups of soldiers to try to establish footholds and that it was uncertain if they could maintain their positions in the face of a Ukrainian push back.
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