"This situation is quite unique, the area is a war zone. I think the international community should be flexible about that and act in a way acceptable to all sides," Russian ambassador to Malaysia Lyudmila Vorobyeva said in a news conference on Tuesday.
"Russia has been calling for a fair, thorough and full investigation led by ICAO since the beginning," she said.
ICAO is the United Nation's International Civil Aviation Organization.
Malaysia Airlines Flight MH17 was shot down last week in eastern Ukraine, killing all 298 passengers and crew on board. The aircraft's black boxes, which could hold information about the crash in rebel-held eastern Ukraine, were handed to Malaysian officials on Tuesday morning.