Donetsk regional administration

The Russian military claimed Sunday to have carried out deadly missile strikes on barracks used by Ukrainian troops in retaliation for the deaths of dozens of Russian soldiers in a rocket attack a week ago. Ukrainian officials denied there were any casualties.

Moscow said on Sunday its army conducted a deadly "retaliatory strike" in the eastern Ukrainian city of Kramatorsk to avenge the deaths of 89 Russian troops killed in Makiivka.

Experts: Unrest in Ukraine is 'well-planned' Kremlin provocation

At least one person died on Thursday during clashes between rival rallies in the Eastern Ukrainian city of Donetsk.

The standoff began when members of an anti-war demonstration labelled "For a United Ukraine" ran into a group of pro-Russian activists at Lenin Square, website Interfax has reported.