Saying they had "irrefutable evidence" that the BUK missile system was used to blow the Malaysia Airlines plane out of the sky, investigators also for the first time pinpointed that the device was fired from a field in a part of eastern Ukraine then controlled by pro-Russia separatists.
The findings of the Dutch-led probe stopped short of directly accusing Moscow of involvement in the tragedy in July 2014, and both the rebels and Russia issued fresh statements denying any responsibility.
The Boeing 777 was ripped apart mid-air during a flight from Amsterdam to Kuala Lumpur over Ukraine, where a war pitting separatists allegedly armed by Russia against the Kiev government erupted in April 2014.
All 298 people on board the plane including 196 Dutch citizens were killed.
Despite two official international investigations, the burning question of who gave the orders and who pulled the trigger remain unresolved.
Ukrainian President Petro Poroshenko hailed the inquiry's initial findings saying: "We have solid proof of who is to blame for this dreadful crime and who bears full responsibility for the terrorist attack."
When it reached Ukraine it was transferred onto a white Volvo truck and escorted by armed men in uniform. Afterwards the missile launcher system "was taken back to Russia," Paulissen said.
Over the past two years, up to 200 investigators have studied half a million photos, videos, some 200 witness statements and 150,000 tapped telephone conversations.
They have also assessed five billion internet pages to painstakingly retrace the route taken by the convoy which brought the missile system into eastern Ukraine.
The 700-kilogramme BUK, a complex radar-guided ground-to-air anti-aircraft weapon, was fired from a field in Pervomaiskyi which at the time "was in the hands of the Russian separatists," said Paulissen.
The joint investigation "has identified approximately 100 people" believed to have had an "active role" in transporting the missile system, added chief investigator Fred Westerbeke.
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