Russian President Vladimir Putin has expressed support for Ukraine's ceasefire and peace plan. But pro-Russian separatists continue fighting in the country's eastern regions.
Putin spoke at a ceremony in Moscow commemorating Nazi Germany's invasion of the Soviet Union in World War Two. He urged all sides to foster a dialogue and seek compromises acceptable to all.
The Russian president also pointed out that attacks were conducted by Kiev loyalists on Saturday and urged his Ukrainian counterpart to swiftly implement the ceasefire.
Ukraine's President Petro Poroshenko spoke to reporters on Sunday while visiting a World War Two memorial in Kiev.
Poroshenko said he is doing all he can to convince citizens in the east that the government will guarantee the ceasefire and peace plan. He urged pro-Russian in the eastern regions to accept the truce.
But sporadic fighting continued on Sunday as separatists rejected any compliance with the president's plan.
Observers say it is unclear whether a ceasefire can be achieved before the June 27th deadline.
Jun. 22, 2014 - Updated 20:58 UTC