"The fight is here; I need ammunition, not a ride," Zelensky told the US, according to the embassy.

"Ukrainians are proud of their President," the tweet adds.

In a video posted on Saturday morning entitled "do not believe the fakes," Zelensky revealed that he is still in Kyiv.

"I am here. We are not putting down arms. We will be defending our country, because our weapon is truth, and our truth is that this is our land, our country, our children, and we will defend all of this," he said.

"That is it. That's all I wanted to tell you. Glory to Ukraine," he added.

Zelensky remains a "prime target for Russian aggression," US State Department spokesperson Ned Price said Thursday evening amid Russia's invasion of Ukraine.

It echoed Zelensky's own words that his intelligence said he has become a key target.

"According to our information, the enemy marked me as target №1, my family - as target №2," Zelensky said Thursday.

"They want to destroy Ukraine politically by destroying the head of state. We have information that enemy sabotage groups have entered Kyiv."