The United States is set to evacuate its embassy in Kyiv as Western intelligence officials warn that a Russian invasion of Ukraine is increasingly imminent, AP reported.

US officials said the State Department plans to announce early Saturday that virtually all American staff at the Kyiv embassy will be required to leave ahead of a feared Russian invasion.

A small number of officials may remain in Kyiv, but the vast majority of the almost 200 Americans at the embassy will be sent out or relocated to Ukraine’s far west, near the Polish border, so the US can retain a diplomatic presence in the country.

The US State Department would not comment.

Earlier, Jake Sullivan, US President Joe Biden’s national security adviser, issued a public warning for all American citizens in Ukraine to leave the country as soon as possible. Sullivan said Russian President Vladimir Putin could give the order to launch an invasion of Ukraine any day now.