In the event of massive use of Oreshnik missiles, the strike will be comparable to the use of nuclear arms, Russian President Vladimir Putin said at a CSTO limited-circle session, APA reports citing TASS. "In the opinion of military and technical experts, in the event of a massive, group strike of these missiles, that is, several missiles at once, in a cluster, their single strike will be comparable to the use of nuclear weapons. Even though, certainly, Oreshnik is not a weapon of mass destruction," the Russian leader said.