Russia is demanding to know why international investigators have yet to publish the black box data from a Malaysian airliner that crashed in eastern Ukraine in July.
298 passengers and crew were killed when the Boeing 777 was shot down.
Russia has blamed Ukraine for the incident.
However, Ukraine says the jet was shot down by pro-Russian separatists.
The Netherlands, which had 195 nationals on board the flight from Amsterdam to Kuala Lumpur, is leading the international investigation into the crash of Malaysia Airlines flight MH17.