President Donald Trump said on social media Saturday that a deal better than “a mere Ceasefire” is in the works with Vladimir Putin, hours after Trump’s high-stakes summit with the Russian leader in Alaska failed to produce an agreement to halt Russia’s invasion of Ukraine.

Ukrainian President Volodymyr Zelenskyy says he will meet U.S. President Donald Trump in Washington on Monday after a Russia-U.S. summit concluded without an agreement to stop the fighting in Ukraine after 3 1/2 years.

President Trump and Russian President Vladimir Putin are scheduled to meet Friday at Joint Base Elmendorf-Richardson in Anchorage, Alaska, to discuss the conflict between Russia and Ukraine.

Russia already controls a fifth of Ukraine, including about three-quarters of Donetsk province, which it first entered in 2014.

Concerns have mounted in Europe and Ukraine that Kyiv may be pressed to give up land or accept other curbs on its sovereignty.

Russia and Ukraine exchanged large waves of attack drones overnight into Sunday as the two combatants maneuvered ahead of Friday's planned summit in Alaska.