Ukrainian officials say that Russia coordinated the takeovers of several Donetsk Oblast government buildings seized over the weaken by heavily armed and masked men in military uniforms.

“We have all concrete proof of Russia’s secret agency involvement in the separatist insurgency and takeovers of government buildings in eastern Ukraine. The evidence and witness testimonies will be presented to the international community on April 17 in Geneva,” Ukraine’s Foreign Ministry said in a statement on April 13.