NATO hit back at Russian President Vladimir Putin's threat of targeting the alliance's member countries with new "invincible" nuclear weapons, calling Russia's aggression "unacceptable and counterproductive," per the AP.

NATO spokeswoman Oana Lungescu, pointing to Russia’s “aggressive actions” in Ukraine and military preparation around Europe, said on Friday, “NATO is pursuing a twin-track approach to Russia; strong deterrence and defense, combined with meaningful dialogue.”