Ahead of an annual NATO summit scheduled for subsequent month, the leaders of alliance members Estonia and Poland on Wednesday careworn the necessity for vigilance over the Wagner mercenary group’s potential relocation to Belarus.

Their feedback got here after Yevgeny V. Prigozhin, the Russian mercenary chief, was reported to have arrived in Belarus on Tuesday, days after being supplied exile as a part of a deal through which he referred to as off a weekend rebellion towards Russia’s navy management.

President Aleksandr G. Lukashenko of Belarus mentioned on Tuesday that the members of the group who had participated within the rise up had been supplied an “abandoned” navy base in his nation, elevating issues amongst Belarus’s neighbors concerning the pressure establishing a presence on their doorsteps. The remaining Wagner members have been supplied the choice of signing contracts with the Russian navy.

Kaja Kallas, Estonia’s prime minister and one in all Ukraine’s staunchest backers, referred to as Belarus a “co-aggressor” with Russia in its warfare with Ukraine.

“Belarus is unpredictable and dangerous, and this has not changed,” she mentioned, talking throughout a joint news convention in Brussels with NATO’s secretary basic, Jens Stoltenberg. “We are ready for any developments.”

Also on Wednesday, the presidents of Poland and Lithuania made a shock go to to Kyiv in a present of help for Ukraine’s bid to affix NATO.

At a news convention after their assembly with President Volodymyr Zelensky, the Polish chief referred to as the attainable switch of the Wagner group to Belarus a risk to NATO’s eastern-flank allies. At the identical time, Mr. Zelensky mentioned that he believed that the Wagner forces that remained within the occupied territories of Ukraine didn’t pose a risk and that the scenario was “under control.”

President Andrzej Duda of Poland mentioned that the Wagner group’s presence in Belarus might “be a potential danger” for his nation and for Lithuania, which share borders with Belarus.

Both Ms. Kallas and Mr. Duda urged NATO to stay vigilant to the attainable presence of Wagner fighters in Belarus. NATO is predicted to approve intimately plans to bolster its eastern flank on the alliance’s summit in Vilnius, Lithuania, on July 11.

Ms. Kallas, on the news convention in Brussels, mentioned that Estonia, which donates greater than 40 p.c of its navy price range to Ukraine, would improve its monetary help to Ukraine’s navy to three p.c of its G.D.P.

And Mr. Stoltenberg mentioned that the Wagner rise up demonstrated “that President Putin’s illegal war in Ukraine is a big strategic mistake.” But he warned NATO allies to not underestimate Moscow’s capabilities.

“We must continue to support Ukraine, and we must keep our defenses strong to send a clear message to Moscow and Minsk that NATO protects every inch of allied territory,” he mentioned, referring to the governments of Russia and Belarus. He mentioned that it was too early to inform what Wagner’s attainable relocation might imply for the area.

In late May, NATO, which offers collective protection to the Baltics, concluded an formidable navy train in Estonia, referred to as Spring Storm, involving some 14,000 troops from a minimum of 11 international locations. NATO’s attain within the Baltics was tremendously enhanced by Finland’s entry into the navy alliance in March. Gaining entry to that nation’s navy, in addition to Finnish airspace, ports and sea lanes, additionally improved NATO’s skill to discourage Moscow’s aggression.

Ms. Kallas made extra feedback after the news convention in Brussels, saying that it was “increasingly clear now that Ukraine is winning this war,” and that it was time to extend stress on Russia and ship a robust message of alliance unity and perseverance to Moscow.

She additionally urged the European Union to make use of seized Russian monetary belongings to assist fund Ukraine’s reconstruction, whereas admitting that some member states had been against setting the authorized precedent of doing so.

The warfare in Ukraine will finish, she mentioned, “when Russia realizes it has made a mistake and cannot win this war.” But its aggression, she mentioned, should not be rewarded with any territorial features, or it’s going to attempt once more, because it did after annexing Crimea in 2014 and getting a weak Western response.