President Donald Trump told former Russian President Dmitry Medvedev to "watch his words" on war warnings, saying he's entering "very dangerous territory."

Russia's Security Council's Deputy Chairman Dmitry Medvedev attends a meeting of the Council for Science and Education at the Joint Institute for Nuclear Research in the Moscow region's city of Dubna,

The attack was the latest in Russia’s escalating air campaign that has targeted Kyiv and dozens of other cities across Ukraine with thousands of drones and missiles in the past few months. It came three days into a 10-day ultimatum given by Trump to Russian leader Vladimir Putin to agree a ceasefire in Ukraine or face tighter sanctions,

Oil prices ticked up in early trading on Wednesday after rising more than 3% in the previous session as potential supply shortages came into focus after U.S. President Donald Trump gave Moscow an abbreviated deadline toward ending the war in Ukraine.