NATO and Ukraine will hold emergency talks over Russia’s new hypersonic missile

“No one in the world has such weapons,” Putin said, adding that testing of the missile would continue “including during combat, depending on the situation and the nature of security threats created for Russia.”

Viktor Orban, the Hungarian prime minister widely seen as having the warmest relations with the Kremlin in the European Union, warned against underestimating Russia’s responses. “It’s not a trick… there will be consequences,” he said.

Donald Tusk, Poland’s prime minister, said the conflict was “entering a decisive phase” and “assuming very dramatic dimensions”, while the country’s foreign minister, Radosław Sikorski, described the attack as “an act of desperation”.

Jan Lipavský, the Czech Foreign Minister, called the strike an “escalating step and an attempt by the Russian dictator to scare the people of Ukraine and the people of Europe.”