Russia does not rule out use of nuclear weapons, Kremlin says

A Kremlin spokesman says Vladimir Putin could use nuclear weapons if Russia is faced "an existential threat".

Asked on CNN what Russian President Vladimir Putin has achieved in Ukraine, Dmitry Peskov denied that Russia’s invasion of Ukraine has stalled. He said: “Well, first of all not yet. He hasn’t achieved yet.”

But he insisted the military operation was going “strictly in accordance with the plans and purposes that were established beforehand”. Mr Peskov reiterated that Mr Putin’s main goals were to “get rid of the military potential of Ukraine” and “ensure that Ukraine changes from an anti-Russian centre to a neutral country”.

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And he refused to rule out the use of nuclear weapons - which was condemned by the USA. Department of Defense spokesman John Kirby said Moscow's nuclear remarks were “dangerous”, the BBC reports.

"It's not the way a responsible nuclear power should act," he told reporters. But Kirby added that Pentagon officials "haven't seen anything that would lead us to conclude that we need to change our strategic deterrent posture”.

Meanwhile, Ukrainian President Volodymyr Zelensky said Russian forces not only blocked a humanitarian convoy trying to reach besieged Mariupol with desperately needed supplies on Tuesday, but took captive some of the rescue workers and bus drivers. He said the Russians had agreed to the route ahead of time.

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“We are trying to organise stable humanitarian corridors for Mariupol residents, but almost all of our attempts, unfortunately, are foiled by the Russian occupiers, by shelling, or deliberate terror,” Mr Zelensky said.