A piece of the wreckage of Malaysia Airlines Flight MH17 in a field near the village of Grabove.

Kiev said Wednesday that a Dutch inquiry into the downing of Flight MH17 over rebel-held eastern Ukraine proved Russia's "direct involvement" in the death of the 298 people on board.

"This information once again points to the direct involvement of the state-aggressor in downing the aircraft," the Ukrainian foreign ministry said in a statement, referring to Russia.