By Andrew Osborn MOSCOW (Reuters) -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.

Moscow's forces are making gains near Pokrovsk in Ukraine's Donetsk region, according to the Institute for the Study of War.

Russian forces moved at least six miles deeper into the Donetsk region in a move that appeared designed to pressure Kyiv