Vladimir Putin vows to increase production of Russia's 'unstoppable' missile - as NATO and Ukraine to hold talks

In a nationally-televised speech, Mr Putin said the intermediate-range Oreshnik missile was used in an attack on Ukrainian city Dnipro in retaliation for Ukraine's use of US and British missiles capable of striking deeper into Russian territory.

Referring to the Oreshnik, the Russian president said: "No one in the world has such weapons.

"Sooner or later other leading countries will also get them. We are aware that they are under development."

Detailing the missile's alleged capabilities, Mr Putin claimed it is so powerful that using several fitted with conventional warheads in one attack could be as devastating as a strike with nuclear weapons.

General Sergei Karakayev, head of Russia's strategic missile forces, said the Oreshnik could reach targets across Europe and be fitted with either nuclear or conventional warheads - while Mr Putin alleged Western air defence systems will not be able to stop the missiles.

Mr Putin said of the Oreshnik: "There is no countermeasure to such a missile, no means of intercepting it, in the world today. And I will emphasise once again that we will continue testing this newest system. It is necessary to establish serial production."

Testing the Oreshnik will happen "in combat, depending on the situation and the character of security threats created for Russia", the president added, stating there is "a stockpile of such systems ready for use".

NATO and Ukraine are expected to hold emergency talks on Tuesday.

Meanwhile Ukraine's parliament cancelled a session as security was tightened following the strike on Dnipro, a central city with a population of around one million. No fatalities were reported.

EU leaders condemn Russia's 'heinous attacks'

Numerous EU leaders have addressed Russia's escalation of the conflict with Poland's Prime Minister Donald Tusk saying the war is "entering a decisive phase [and] taking on very dramatic dimensions".

Speaking in Kyiv, Czech foreign minister Jan Lipavsky called Moscow's strike an "escalatory step and an attempt of the Russian dictator to scare the population of Ukraine and to scare the population of Europe".

At a news conference, Mr Lipavsky gave his full support for delivering the additional air defence systems needed to protect Ukrainian civilians from the "heinous attacks".

-SKY NEWS