Russian President Vladimir Putin said on Friday that Russia would keep testing the hypersonic Oreshnik missile it fired at Ukraine a day earlier and begin serial production of the new system.
Putin, in televised comments, said the missile was incapable of being intercepted by an enemy.
"I will add that there is no countermeasure to such a missile, no means of intercepting it, in the world today. And I will emphasize once again that we will continue testing this newest system. It is necessary to establish serial production," he said.