Russia and Ukraine again exchanged a series of major overnight drone strikes as the two sides maneuvered ahead of a possible resumption of ceasefire talks later this week.Renewed talks -- if they do happen -- would take place as both Kyiv and Moscow near new records for the scale and intensity of cross-border strikes,

Meanwhile the Ukrainian capital of Kyiv came under heavy bombardment overnight into Monday, in what officials described as the worst aerial assault on the capital in months.