Italy, Spain, and Greece have all also closed their embassies in Kyiv today, Paralel.Az reports citing Ukraine's state broadcaster Suspilne.

The US embassy earlier said it had received “specific information” of a potential significant air attack and would be closed.

Suspilne reports that the intelligence indicates a combined drone and missile attack on the capital, and is not thought to be related to Russia’s change in its nuclear doctrine yesterday.

Air alerts have been declared in Kyiv and a number of other regions.