Lavrov said he had been informed by a Dutch minister that "they have practically no doubt that the BUK [missile] came from Russian Federation".
Westerbeke said investigators were not yet ready to identify individual suspects publicly or to issue indictments, but that when they do he expects cooperation, or a firm worldwide political response.
Of the 298 people killed, 196 were Dutch, 42 were Malaysian and 27 were Australian.
It was sacked from rebel-held territory in Ukraine.
Meanwhile, the Dutch government said on May 25 that the Netherlands and Australia will hold Russian Federation legally responsible for shooting down MH17 and the deaths of all 298 people on board.
The Kremlin on Friday rejected allegations of any Russian involvement in the downing of Malaysia Airlines Flight 17, with spokesman Dmitry Peskov telling reporters that Russia could not trust the investigation's findings because it had not been its fully-fledged participant. He said Russian Federation has been barred from the worldwide investigation and thus can't trust its results.
MH17 was shot down over rebel-held territory in Eastern Ukraine in 2014, killing all 298 aboard including 28 Australians as it flew from Amsterdam en route to Kuala Lumpur.
The Netherlands and Australia say they are holding Russia legally responsible for the plane's downing after worldwide investigators concluded that the missile that hit the plane came from a Russian military unit, accusations Russia has rejected.
The Russian Foreign Ministry also criticized the investigators for allegedly ignoring evidence provided by Russia, including radar surveillance of the airspace at the time of the flight.
Malaysia Airlines Flight MH17: Russian Missile, Military Unit That Shot Down Plane Killing 298 Is Revealed
Investigators probing the 2014 downing of flight MH17 said Thursday for the first time that the missile which brought down the plane over eastern Ukraine originated from a Russian military brigade.
Holding Russia accountable for its part in the downing of flight MH17 is separate from the criminal investigation and any prosecution and trial of the perpetrators of the downing of flight MH17. The global team running the criminal investigation appealed for help from witnesses who can testify about the involvement of the Russian military's 53rd anti-aircraft missile brigade based in the city of Kursk.
"State responsibility comes into play when states fail to uphold provisions of worldwide law and that's clearly the case", Dutch Prime Minister Mark Rutte told reporters in The Hague.
"Russia didn't cooperate with the global legal requests in relation to the investigation", Rutte said, referring to the probe carried out by prosecutors from Australia, Malaysia, Belgium, Ukraine and the Netherlands.
"I asked him about facts proving these claims", said Mr Lavrov. "They want to see closure but they also deserve justice and we will be seeking reparations for the atrocities caused by this conduct", she said.
The ministry said Friday the fragments displayed by investigators indicated the Soviet-made missile was produced in 1986.
Investigation officials have not yet said who actually fired the missile, stressing that the probe continues. But they had stopped short of directly saying who pulled the trigger.
Meanwhile, the investigative site Bellingcat claimed it had identified the second of two men whom the JIT has fingered as top suspects after obtaining their wire-tapped conversations before and after the plane was shot out of the sky.
Inside North Korea's nuclear test site demolition show
Secretary of State Mike Pompeo, speaking to a Senate committee on Thursday, would not confirm whether Seoul had been notified. North Korea releases three Americans who had been imprisoned, and they return with Pompeo to the United States.