On the campaign trail, Trump repeatedly said he would bring an end to the war within a day of taking office. Putin said Russia's goal is to remove what he called the root causes of the conflict in Ukraine and create conditions for lasting peace, according to the RBC news agency.

President Donald Trump said Saturday that he plans to speak with Russian President Vladimir Putin, Ukrainian President Volodymyr Zelensky and NATO leaders in separate phone calls on Monday to try to arrange a ceasefire in the war in Ukraine.

Ukraine says Russia has launched its biggest drone attack since the full-scale invasion began, targeting several regions including Kyiv, where one woman died. Russia had launched 273 drones by 08:00 Sunday (05:00 GMT) targeting the central Kyiv region and Dnipropetrovsk and Donetsk regions in the east, Ukraine's air force said.

A Russian drone has struck a passenger bus in Ukraine’s northeastern Sumy region, killing nine people and injuring four others

The attack came hours after the two countries failed to broker a temporary ceasefire after holding their first peace talks in three years of war.