U.S. and Ukrainian authorities have been at the forefront of accusations that the separatists, aided by Russia, are responsible, although other countries, including Australia and Britain have offered similar, if less definitive, assessments.
British Prime Minister David Cameron said in an unusual front-page piece in the Sunday Times that there is growing evidence that separatists backed by Russia shot down the aircraft.
“If President (Vladimir) Putin does not change his approach to Ukraine, then Europe and the West must fundamentally change our approach to Russia,” Cameron wrote.