U.S. ambassador to the United Nations Mike Waltz warns Vladimir Putin that Trump's push for NATO allies to shoot down intruding Russian aircraft is serious.

Vladimir Putin's ally, Dmitry Medvedev, issued a harsh rebuke of Donald Trump on Wednesday, saying on Telegram that the U.S. president has "slipped into an alternate reality" after Trump stated on Tuesday that Ukraine can reclaim all territory lost to Russia, marking a sharp shift from his earlier calls for Kyiv to make concessions.

Estonia, Lithuania and Romania warn that Russian drone and air violations require sustained U.S. military presence on NATO's eastern flank for effective deterrence.

U.S. allies called an emergency meeting of the U.N. Security Council after a series of incidents raised alarm about growing Russian threats to Europe.

India rejected as "incorrect and baseless" remarks by NATO's chief that suggested Indian Prime Minister Narendra Modi was contacting Russian President Vladimir Putin over the impact of punitive U.S. tariffs on its purchases of Russian oil.

Russian President Vladimir Putin has announced that Moscow will adhere to nuclear arms limits for one more year after the last remaining nuclear pact with the U.S. expires.

The Ukrainian president addresses the UN General Assembly after Donald Trump says for the first time that Kyiv could retake its lost borders.

Putin made the commitment at a meeting of Russia's Security Council on Monday, September 22. His spokesman Dmitry Peskov had earlier said Putin would make "a number of important statements" at the meeting.

Mr. Putin said Russia didn’t want to provoke a strategic arms race with the United States, but his offer is limited in scope.

President Donald Trump’s abrupt shift on the war in Ukraine this week came amid fresh frustration at Russian President Vladimir Putin, and was intended to apply more pressure on Moscow to come to the negotiating table,