A new prisoner swap between Ukraine and Russia has begun, officials in both countries said Monday, with Ukrainian soldiers who have spent nearly the entire duration of the war in captivity among those returning home.

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, adding that the wounded, seriously wounded and soldiers under 25 were being returned.