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.
More top news
The Duke of Cambridge also laid a wreath in memory of the brave policeman who was killed in last week's terror attack in London.
The four 'newish' insights into what Brexit means to Theresa May in her letter to Donald Tusk.
Mild with cloudy skies