Satellite imagery has been processed to create a video showing an ammo depot in the east of Ukraine where the equipment is being brought by cargo trains from the territory of Russia.
"Take a few minutes to view a large Russian army supply depot in Ukraine. Military supplies seen arriving via goods trains from Russia," reads the tweet.
Russia has repeatedly denied involvement in Donbas conflict and refuted accusations of supplying the pro-Russian militants with weapons, ammunition and live force.
Ukrainian state agencies and volunteers continue their systemic work on amassing evidence of Russian aggression in Ukraine.