Ukraine's armed forces claim to have killed "around 100" rebel fighters near the eastern town of Snizhne.
Defence officials said government forces had also destroyed 11 missile systems and tanks but the claims could not be immediately verified.
While rebels said they had seized two settlements west of Snizhne and captured 13 Ukrainian troops, including three officers.
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Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.