President Donald Trump and Russian President Vladimir Putin will speak Tuesday about how to finally end the devastating three-year war in Ukraine

U.S. President Donald Trump said Sunday night he plans to speak with President Vladimir Putin on Tuesday as their countries negotiate a cease-fire to the war in Ukraine.

President Donald Trump announced the call Sunday and said there would be concessions over land and power plants.

Ukraine has key demands from Russia as well. Kyiv refuses to cede more territory to Moscow, including those in partially occupied regions. Also, Ukraine is seeking the return of children illegally deported to Russia and thousands of civilians detained in Russian prisons.

The barrage comes less than 24 hours after Russian President Vladimir Putin discussed details of the U.S. proposal for a 30-day ceasefire with a U.S. envoy.

Russia and Ukraine continued aerial attacks on each other, inflicting injuries and damages, officials said early on Sunday, as the fate of a proposed ceasefire to the three-year-old war remained uncertain.