"We strive to carry out a fair investigation into the tragedy and all the key facts were concealed and are being concealed," he added.
Russia is part of the investigating team that also includes experts from Australia, Britain, Germany, Malaysia, the United States and Ukraine, as well as the International Civil Aviation Organization.
The Netherlands is leading two international investigations into the disaster: an air safety accident resort led by the Dutch Safety Board, which will examine the technical causes of the crash, and a criminal investigation examining who was responsible.
The Malaysia Airlines Boeing 777, flying from Amsterdam to Kuala Lumpur, crashed in Ukraine’s eastern Donetsk region on July 17, some 60 kilometers (around 37 miles) from the Russian border in the zone of combat operations between militia and the Ukrainian army. All 298 passengers and crew on board perished, the Netherlands reporting nearly 200 victims, the highest death toll in the disaster.
In early September, the Dutch Safety Board said in its preliminary report that the MH17 flight broke up in the air probably as a result of structural damage caused by a large number of high-energy objects that penetrated the aircraft from outside. A surface-to-air missile that allegedly hit the plane is considered the biggest factor behind the crash.