The head of EU diplomacy, Josep Borrell, sees the possible movement of Russian tactical nuclear weapons in Belarus as a threat to European security.

 Borrell said this in response to the Russian President Putin's announced intention to transfer nuclear weapons to Belarus.

 "Placing Russian nuclear weapons in Belarus would mean an irresponsible escalation and a threat to European security," Borrell said on his Twitter account on Sunday.

 He emphasized that Belarus can still stop it, and "this is its choice."

 Borrell stressed that in any case the EU is ready to respond to escalation with further sanctions.

 On March 25, Russian President Vladimir Putin announced that Russia would place tactical nuclear weapons in Belarus, and the storage facility for them should be ready by July.

 NATO called Russia's nuclear rhetoric "dangerous and irresponsible," and the United States said it saw no signs of Russia preparing to use nuclear weapons.

 The Ministry of Foreign Affairs of Ukraine demands to immediately convene an extraordinary meeting of the UN Security Council and expects effective actions to counter nuclear blackmail of the Kremlin by Great Britain, China, the United States and France.