US President Joe Biden warned Americans in Ukraine to leave the country immediately amid tensions between Moscow and Kiev, saying that sending US troops for an evacuation would mean "world war". "American citizens should leave now," Biden said during an interview with NBC News. "It's not like we're dealing with a terrorist organization. We're dealing with one of the largest armies in the world. It's a very different situation and things could go crazy quickly," he said, according to NBC News.

Asked about what scenario would require US troops to enter Ukraine to evacuate Americans, Biden responded: "There's not. That's a world war when Americans and Russia start shooting at one another." Meanwhile, the US State Department has issued a new advisory urging Americans in Ukraine to leave the country at the earliest possibility, strengthening earlier warnings that urged its citizens to "consider" such action.