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.

Russian forces targeted regions throughout Ukraine with at least 479 attack drones, marking one of the largest such overnight aerial strikes of the war, Ukraine's air force said Monday. "According to preliminary data,

Neither country disclosed how many prisoners were transferred.

Russia and Ukraine on Thursday confirmed a new prisoner swap had taken place under agreements reached between the two countries during their second round of direct peace talks in Istanbul earlier this month.

The two sides agree to swap prisoners and remains of about 6,000 soldiers killed in combat but are at odds over a truce.