A Ukrainian drone attack destroyed more than 40 Russian planes deep in Russia’s territory, a Ukrainian security official told The Associated Press on Sunday, while Russia pounded Ukraine with missiles and drones a day before the two sides meet for a new round of direct talks in Istanbul.

The official, who spoke on condition of anonymity to disclose operational details, said the attack took over 18 months to plan and execute and was personally supervised by Ukrainian President Volodymyr Zelenskyy.

The operation saw drones transported in containers carried by trucks deep into Russian territory, he said. The drones reportedly hit 41 planes stationed at several airfields on Sunday afternoon, including A-50, Tu-95 and Tu-22M aircraft, the official said. Moscow has previously used Tupolev Tu-95 and Tu-22 long-range bombers to launch missiles at Ukraine, while A-50s are used to coordinate targets and detect air defenses and guided missiles.

Russia’s Defense Ministry in a statement confirmed the attacks, which spanned five airfields. The FPV drones damaged aircraft and sparked fires on air bases in the Irkutsk region, more than 2,500 miles from Ukraine, as well as Russia’s northern Murmansk, it said. Strikes were repelled in the Amur region in Russia’s Far East and in the western regions of Ivanovo and Ryazan, the ministry said.

The attack came the same day as MR. Zelenskyy said Ukraine will send a delegation to Istanbul for a new round of direct peace talks with Russia on Monday.

In a statement on Telegram, Mr. Zelenskyy said that Defense Minister Rustem Umerov will lead the Ukrainian delegation. “We are doing everything to protect our independence, our state and our people,” Mr. Zelenskyy said.

Ukrainian officials had previously called on the Kremlin to provide a promised memorandum setting out its position on ending the war before the meeting takes place. Moscow had said it would share its memorandum during the talks.

(KYIV)