NATO said Monday that it’s putting extra forces on standby and sending more ships and fighter jets to eastern Europe, as Ireland warned that new Russian war games off its coast are not welcome given tensions over whether President Vladimir Putin intends to attack Ukraine.

The U.S.-led military organization said that it is beefing up its “deterrence” presence in the Baltic Sea area. Denmark is sending a frigate and deploying F-16 war planes to Lithuania; Spain will also send warships and could send fighter jets to Bulgaria; and France stands ready to send troops to Romania.

Secretary-General Jens Stoltenberg said NATO will “take all necessary measures to protect and defend all allies.” He said: “We will always respond to any deterioration of our security environment, including through strengthening our collective defense.”

The announcement came as European Union foreign ministers sought to put on a fresh display of resolve in support of Ukraine, and paper over concerns about divisions on the best way to confront any Russian aggression.

“We are showing unprecedented unity about the situation in Ukraine, with the strong coordination with the U.S.,” EU foreign policy chief Josep Borrell, who is chairing their meeting, told reporters in Brussels.

Asked whether the EU would follow a U.S. move and order the families of European embassy personnel in Ukraine to leave, Borrell said: “We are not going to do the same thing.” He said he is keen to hear from Secretary of State Antony Blinken about that decision.

Britain on Monday also announced it is withdrawing some diplomats and dependants from its embassy in Kyiv. The Foreign Office said the move was “in response to the growing threat from Russia.”

Ukraine’s foreign ministry spokesman, Oleg Nikolenko, said the U.S. decision was “a premature step” and a sign of “excessive caution.” He said that Russia is sowing panic among Ukrainians and foreigners in order to destabilize Ukraine.

Germany is monitoring developments, but German Foreign Minister Annalena Baerbock stressed that “we must not contribute to unsettling the situation further; we need to continue to support the Ukrainian government very clearly and above all maintain the stability of the country.”

Arriving at the EU meeting, Irish Foreign Minister Simon Coveney said he would inform his counterparts that Russia plans to holds war games 240 kilometers (150 miles) off Ireland’s southwest coast — in international waters but within Ireland’s exclusive economic zone.

“This isn’t a time to increase military activity and tension in the context of what’s happening with and in Ukraine.” Coveney said. “The fact that they are choosing to do it on the western borders, if you like, of the EU, off the Irish coast, is something that in our view is simply not welcome and not wanted right now, particularly in the coming weeks.”