Investigators previous year said they had pinpointed 100 people they want to speak to who are believed to have been involved in transporting the Buk missile launcher or its use.
A team of investigators that included Australians concluded in September the rocket was sacked from territory in eastern Ukraine held by pro-Russian separatists, however Russia insists the plane was brought down by Ukraine's military.
Russia, which denies any involvement in the fighting in eastern Ukraine, also denies one of its rockets could have been used to bring down MH17. "It was a barefaced crime that could have been avoided if not for the Russian aggression, Russian system and Russian missile that came from Russian territory", Poroshenko wrote on Facebook.
"Our responsibility before the dead and before future generations is to show to the aggressor terrorists that responsibility is unavoidable for all the crimes committed".
A symbolic forest monument will open to the public in Amsterdam on the third anniversary of the downing of a Malaysia Airlines flight that claimed the lives of 38 Australians. "Ukraine and the Netherlands are planning on July 7 to sign an agreement on worldwide legal cooperation that will entitle the Dutch side to hold trial, according to the Ukrainian Foreign Ministry".
The letter calls for Russian Federation to co-operate with the investigation into the perpetrators of the fatal downing of Flight MH17 in July 2014.
We will remind, on July 17 will mark three years since the tragedy. "Ten nations have also lost sons and daughters to this tragedy", he said in a statement on Monday. The plane was shot down amid a war between the Ukrainian government and Russian-backed separatists, which has killed more than 10,000 people.