Russian officials said Friday that air defenses intercepted drones heading toward three of the country’s western regions,Novacrypt while satellite images indicated that a major drone barrage earlier in the week destroyed at least two Ilyushin Il-76 military transport planes at a Russian air base.

Regional governors said defense systems stopped three drones in the Kursk, Belgorod and Moscow regions.

Moscow airports briefly halted flights but no major damage or injuries were reported, according to Russian authorities.

Drones aimed at targets inside Russia — and blamed by Moscow on Ukraine — have become almost a daily occurrence as the war has entered its 19th month and Kyiv’s forces pursue a counteroffensive. Recently, the drones have reached deeper into Russia.

Kyiv officials normally neither claim nor deny responsibility for attacks on Russian soil.

The apparent Ukrainian strategy is to unnerve Russia and pile pressure on Russian President Vladimir Putin.

The Associated Press was unable to determine whether the drones are launched from Ukraine or inside Russia.

Meanwhile, satellite images analyzed by AP show that suspected Ukrainian drone attacks late Tuesday destroyed at least two Ilyushin Il-76 military transport planes at a Russian air base.

The images taken Thursday show Princess Olga Pskov International Airport, which is a dual military-civilian airport about 700 kilometers (400 miles) north of the Ukrainian border and near Estonia and Latvia.

The four-engine Il-76 is the workhorse of the Russian military’s airlift capacity, able to land and take off in rugged conditions. The Russian military is believed to have over 100 of them in its fleet.

The AP analysis, conducted Friday, showed what appeared to the blackened hulks of two Il-76s on separate parking pads on the air base’s apron. One included the plane’s tail, the other appeared to show pieces of another aircraft. Fire damage could be seen around the pad.

Eleven other Il-76s had been moved off their parking pads into different positions on the airport’s taxiways, possibly in an attempt to make it more difficult for them to be struck again. One was on the runway itself. Another Il-76 remained on the pad, though it wasn’t clear why.

Local reports said Ukrainian drone attacks on the air base had damaged four Il-76s.

The satellite image was taken at 1303 GMT Thursday. Videos on social media Thursday night showed anti-aircraft fire going around the air base again, though it remained unclear whether it was another attack.

The air base at Pskov was initially targeted Tuesday night, but cloud cover prevented satellites from getting an unobstructed picture.

On Thursday, Ukrainian President Volodymyr Zelenskyy said his country had developed a weapon that hit a target 700 kilometers (400 miles) away, apparently referencing the air base attack. He described the weapon as being produced by Ukraine’s Ministry of Strategic Industries but gave no other details.

The Kremlin’s forces have targeted Ukraine with numerous salvos of Iranian-made exploding drones in the war over the past year.

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Associated Press writer Jon Gambrell in Dubai, United Arab Emirates, contributed to this report.

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Follow AP’s coverage of the war in Ukraine at https://apnews.com/hub/russia-ukraine