Ukrainian drones hit Russia's Sochi resort while Russian forces bombarded Odessa's residential areas and historic Pryvoz market, hours after ceasefire talks collapsed.

The attacks came hours after brief direct talks failed to make any progress on steps to end nearly three-and-a-half years of war.

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.