Ukrainian President Petro Poroshenko said the Russian government should be held accountable for the downing of Malaysia Airlines Flight MH-17 last year over eastern Ukraine.
In an interview on CNN's , Poroshenko said the nation or person responsible for shooting down the Malaysian airline should be brought to justice.
A Dutch-led investigative panel into the crash of MH-17 said in a report released last week that the plane was shot down by a Russian-made surface-to-air missile.
The head of Russian Federal Aviation Agency has disputed the reports.
Russia has asked the United Nations to open a new investigation into downing of the flight.
The Boeing 777 was downed on July 17, 2014, over eastern Ukraine, the scene of fighting between pro-Russia rebels and Ukrainian government forces, killing all 298 people on board, most of them Dutch nationals.
The Dutch-led panel, which included investigators from Australia, Belgium, Malaysia and Ukraine, did not explicitly assign blame, despite Western suspicions that pro-Russia rebels in eastern Ukraine shot down the plane, mistaking it for a military aircraft.
The 15-month probe only identified an area of 320 square kilometers (120 square miles) from where it said the launch must have taken place.