A close ally of President Vladimir Putin warned Western governments on Thursday that a nuclear war would ensue if they gave the green light for Ukraine to use long-range Western weapons to strike targets deep inside Russia.

The Russian president earlier this year rebuffed Defense Ministry officials who had tried to convince him they needed more soldiers.

On Wednesday, the Kremlin condemned comments by outgoing NATO chief Jens Stoltenberg as “dangerous”, Reuters reports. Stoltenberg had suggested that allowing Ukraine to use Western long-range missiles to strike Russian territory would not trigger an escalation from Moscow.

NATO Secretary General Jens Stoltenberg is sceptical of Russian leader Vladimir Putin's threats, which come amid discussions about allowing Ukraine to launch long-range missiles deep into Russia. Source: Stoltenberg in an interview with The Times,