Russia will not accept a reported Turkey-formulated proposal to end to the fighting in Ukraine after nearly 1,000 days of war, the Kremlin said on Monday, as the prospect of a ceasefire that had long seemed unrealistic looms over the horizon with a new U.

President Biden's decision to allow Ukraine to fire U.S.-made and supplied missiles deeper into Russia — a major policy shift announced over the weekend after months of intense lobbying by Kyiv — has drawn a furious response from Moscow.

Vladimir Putin has approved an updated nuclear doctrine, saying that Russia could consider using nuclear weapons if it is subject to a conventional missile assault on it supported by a nuclear power.