Ukraine's president says a new prisoner exchange with Russia is ongoing and will take days, as both sides continue launching hundreds of attack drones.

A prisoner exchange is under way between Russia and Ukraine, governments in Moscow and Kyiv have confirmed. Ukraine's President Volodymyr Zelensky said the exchange would unfold "in several stages" over the coming days,

Russia and Ukraine started a major prisoner exchange on Monday after days of wrangling cast doubt over the only concrete result of peace talks last week in Turkey.