Fierce battles in Ukraine's restive eastern regions over the past 24 hours left at least six government troops dead, a Ukrainian government spokesman said on Tuesday.
Meanwhile, over 30 servicemen were wounded in combat action against independence-seeking rebels, said Andrei Lysenko, a spokesman for Ukraine's National Security and Defense Council (NSDC).
Government forces had clashed 26 times with insurgents over the past 24 hours, Lysenko added.
Overnight, at least seven civilians were wounded during confrontation in the city of Donetsk which is controlled by the rebels, the country's State Service for Emergencies said.
According to the agency, all those injured were taken to local hospitals with shrapnel and gunshot wounds.
There was no information about civilian casualties in the other war-torn cities and towns of eastern Ukraine, where battles have been underway since mid-April.