Russia continued its air strikes on Ukraine overnight, hours after Ukrainian President Volodymyr Zelensky said he had a "very constructive" phone call with Donald Trump's negotiating team following three days of talks in Florida, BBC reported. 

Early on Sunday the mayor of Kremenchuk, a major industrial hub in central Ukraine, said the city had been repeatedly struck in a "massive" attack. No deaths have been confirmed so far.

Meanwhile, Russia said it had shot down 77 Ukrainian drones in several locations, according to BBC.