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"During 2012–16 Russia delivered weapons to 50 states and to rebel forces in Ukraine," the report reads.

"Rebels in eastern Ukraine received tanks and other armoured vehicles as well as anti-tank and portable surface-to-air (SAM) missiles from Russia," the experts say.

Read alsoRussian military supplies to Donbas revealed in videoAs UNIAN reported earlier, the organization claims Ukraine in 2016 exported to Russia military products worth $169 million, which makes the Russian Federation the largest buyer of Ukrainian defense industry’s goods.