In a dramatic escalation of East-West tensions over Russia’s invasion of Ukraine, President Vladimir Putin ordered Russian nuclear forces put on high alert Sunday in response to what he called “aggressive statements” by leading NATO powers. The directive to put Russia’s nuclear...

VIENNA — Austria and Italy are joining a growing list of European countries in closing their airspace to all Russian aircraft as the West ramps up pressure on Russian President Vladimir Putin for ordering an invasion of Ukraine. Several other European countries, including Germany, the...

KYIV, Ukraine (AP) — Street fighting broke out in Ukraine’s second-largest city and Russian troops squeezed strategic ports in the country's south Sunday, advances that appeared to mark a new phase of Russia's invasion following a wave of attacks on airfields and fuel facilities elsewhere in...

GENEVA — The United Nations says it has confirmed at least 240 civilian casualties, including at least 64 people killed, in the fighting in Ukraine that erupted since Russia’s invasion on Thursday — though it believed the “real figures are considerably higher” because many...