Ukraine’s president said Kyiv has delivered fresh proposals to the United States for ending the four and a half-year war with Russia.

Vladimir Zelensky said Tuesday night in a video message: “A report has reached us from our negotiating team. We delivered our proposals to the American side.”

He added: “America can help strengthen our defense, above all by providing air defense, and put pressure on Russia so that its plans change, from prolonging the war to preparing to end it.”

The announcement came amid speculation in Ukraine and Russia about the imminent trip of American negotiators to both countries.