Russian President Vladimir Putin has promised more combat test-firing of an experimental hypersonic missile – the Oreshnik – which was launched at Ukraine on Thursday.

Ukraine is seeking updated air defence systems from its allies in response to the new threat from Russian hypersonic missiles, Ukraine’s President Volodymyr Zelenskyy said.

Experts believe the Oreshnik can fly at 10 times the speed of sound and may be able to strike targets up to 5,500km (3,400 miles) away.

General Sergei Karakayev, head of Russia’s Strategic Missile Forces, said the Oreshnik could reach targets across Europe and be fitted with nuclear or conventional warheads.

China’s Foreign Ministry repeated calls for “calm” and “restraint” in the war after Russia confirmed it had fired a new ballistic missile at Ukraine.

Zelenskyy said in his nightly address that Russia’s escalation of the conflict was making a mockery of international calls for de-escalation. “From Russia, this is a mockery of the position of states such as China, states of the Global South, some leaders who call for restraint every time,” he said.

Polish Prime Minister Donald Tusk expressed the alarm felt by some over the latest development in Russia’s war on Ukraine. “The war in the east is entering a decisive phase. We all know this,” he said. “The events of the last several dozen hours show that the threat is very serious and real when it comes to global conflict.”

German Chancellor Olaf Scholz described the use of the hypersonic missile as a “terrible escalation, just like the use of North Korean soldiers, who are now being deployed and dying in this war for Putin’s imperial dream.”

NATO and Ukraine will hold emergency talks on Tuesday after Russia launched an attack with the experimental, hypersonic ballistic missile.

In Kyiv, parliament cancelled its usual Friday questions to the government over fears of an attack. Several members of parliament said they were working remotely and that Friday’s session had been scrapped.