Zelensky said on his Instagram account that the visit "is a strong signal of bipartisan support for Ukraine from the United States Congress and the American people."

He added: "Thank you for your leadership in helping us in our struggle not only for our country, but also for democratic values and freedoms.

It's unclear whether the meeting took place Saturday and whether the delegation is still in the Ukrainian capital.

McConnell and the other senators are the latest US officials to visit Ukraine since Russia invaded the eastern European nation in late February.