A little more on those remarkable comments from Ukrainian President Volodymyr Zelensky earlier.

He said in a video address: "They [Russians] want to destroy Ukraine politically by liquidating the head of state."

He also told viewers "the enemy has designated me as the target number one, and my family as the target number two".

The president said he was staying in the capital Kyiv's "government quarters" and his family was also in Ukraine. He did not provide further details.

Zelensky also warned Ukrainian officials now had "information that enemy sabotage groups have entered Kyiv".

The president did not elaborate on what those groups might be.