Russia thwarted a massive Ukrainian drone attack, shooting down as many as 42 drones near Crimea, Moscow's Defense Ministry reported Friday.

The barrage was the largest recent air attack on the peninsula and a day after Kyiv claimed a special forces raid on the territory.

Crimea, annexed by Russia in 2014, has been targeted by Kyiv throughout Moscow's Ukraine offensive but has come under more intense, increased attacks in recent weeks.

Nine drones were "destroyed ... over the territory of the Republic of Crimea," the defense ministry wrote on Telegram early Friday.

Thirty-three others "were suppressed by electronic warfare and crashed without reaching the target," it said, without specifying whether there had been any damage or casualties.

Earlier, a local Russian-installed official said several drones had been destroyed over the sea off Crimea's Cape Khersones.

The cape is located in the southwest of the peninsula near Sevastopol, which is home to Russia's Black Sea fleet.

Emergency services reported no damage to civilian infrastructure from those drones, Sevastopol governor Mikhail Razvozhayev wrote on Telegram.

It was not clear whether they were included in the 42 reported by the Defense Ministry.

"All forces and services are in a state of combat readiness," Razvozhayev said.

Kyiv has repeatedly said it plans to take Crimea back.

In recent weeks it has targeted Russian infrastructure on the peninsula with barrages of up to 28 aerial drones.

On Thursday, Ukraine said its forces had landed on the peninsula and flown the country's flag during a "special operation" to mark its second wartime Independence Day.

Special forces troops had landed overnight on Crimea's western shore near the towns of Olenivka and Mayak, where they had "engaged in combat," Ukraine's GUR intelligence agency said.

Moscow has also accused Ukraine of attacking the Russian-built Crimean bridge, which connects the peninsula to Russia.

The bridge has been closed due to multiple incidents including a massive explosion in October last year.

Missile

Reports of the aerial attack come as the Pentagon said it would begin training Ukrainian F-16 pilots in the United States starting next month.

The jets have long been sought by Kyiv, now bogged down in a plodding counteroffensive aimed at retaking land held by Russian forces.

U.S. President Joe Biden and Ukrainian leader Volodymyr Zelenskyy spoke Thursday about plans to train Ukrainian pilots to fly F-16 fighter jets, the White House said.

Earlier, Biden had said he was "not surprised" at news that Yevgeny Prigozhin, head of the Wagner mercenary group and who led a brief mutiny against Russia's military, may have died in a plane crash.

"I don't know for a fact what happened, but I'm not surprised," Biden said.

Putin broke his silence Thursday on news of the crash, paying a qualified tribute to the mercenary boss and the paramilitary group he led.

"He was a man of complicated fate, and he made serious mistakes in his life, but he achieved the right results," Putin said.

Air defense systems destroyed a Ukrainian missile over Kaluga region, Moscow's Defense Ministry said Friday.

Kaluga borders the Moscow region, which has been targeted by a barrage of Ukrainian drone attacks in recent days after Kyiv vowed to "return" the conflict to Russia.

Flights to and from Moscow's Vnukovo and Domodedovo airports were briefly halted, the TASS news agency reported Friday, citing aviation services and without specifying why.