New round of talks on Ukraine will be held in Minsk, the Belarusian capital.
Russian President Vladimir Putin accused Europe on Monday of ignoring the Ukrainian army "directly targeting" civilians in eastern Russia
Ukraine's troops on Monday were battling a Russian tank contingent in the eastern city of Lugansk, Kiev said.
The White House said it could not confirm reports that Ukraine had disabled vehicles in a Russian convoy inside Ukraine and warned Moscow that any intervention into Ukraine without Kiev's permission was unacceptable.
The latest deaths come as Ukraine's military says it is gearing up to retake the main insurgent bastion in the east, after a month of solid advances saw government forces encircle insurgents hunkered there.
President Barack Obama says that US sanctions levied against Russia over its actions in Ukraine are working.
The Indian Embassy in Kiev advised Indian students planning to return for their new academic year in institutions in Ukraine to postpone their travel.
Malaysia issued an impassioned plea Saturday for the MH17 disaster site in Ukraine to be protected from tampering, saying evidence was being compromised in what it called a "betrayal of the lives that were lost."
Russia fought back on Saturday against claims of its involvement in the downing of a Malaysia Airlines jet MH17 in rebel-held eastern Ukraine, instead implying that the government in Kiev might be responsible.
Russian President Vladimir Putin on Friday said Ukraine bore responsibility for the downing of MH17 in the country's east.
Putin warned Washington that the sanctions will backlash against American companies working in Russia.
While Obama has put a premium on responding to the provocations in coordination with Europe, the White House has grown increasingly frustrated with the continent's reluctance to impose sanctions on Russian economic sectors.
The United States on Wednesday imposed its most wide-ranging sanctions yet on Russia's economy.
An airstrike in eastern Ukraine sent an apartment building crumpling to the ground on Tuesday, killing at least 11 people.
Ukraine rejected talks with pro-Russian rebels on a truce to halt a bloody insurgency convulsing the ex-Soviet nation until they laid down their arms.
Ukraine is set to sign an EU agreement pulling his country out of Moscow's reach as pro-Russian rebels freed four OSCE observers after 31 days in captivity.
Four OSCE observers who were abducted on 26 May by pro-Russian rebels in eastern Ukraine have been freed and have arrived at a hotel in Donetsk.
Ukraine's leader has told Joe Biden that Russian-backed separatists continue to attack Ukrainian forces despite a unilateral ceasefire declaration.
The publication of the 14-point initiative followed two phone conversations in 72 hours between President Petro Poroshenko and Russia's Vladimir Putin, which highlighted the Kremlin's lingering influence over its smaller western neighbour.
Ukraine's forces have restored control of the border with Russia and can now prevent military equipment being brought across the frontier to support pro-Russian separatists.