Russia said Ukraine fired a string of drones over the weekend in an attempt to attack border regions and the capital, Moscow, in the latest strikes deep inside Russian borders.

Russia’s Ministry of Defense said Sunday that its forces had intercepted Ukrainian drones overnight in the regions of Bryansk and Kursk, both of which border Ukraine. A drone crashed into an apartment building in Kursk but did not cause any injuries, the regional governor said on the Telegram messaging app.

The border region of Belgorod also was attacked by drones over the weekend, according to the Russian authorities. One person was killed in the village of Shchetinovka and another drone was intercepted by air defenses on Saturday, the regional governor, Vyacheslav Gladkov, said in Telegram posts.

The Russian claims had not been independently verified and Ukrainian officials did not immediately comment, as is their general custom on attacks inside Russia.

Such attacks have recently become a more regular occurrence in the 18-month-long war. Since July, Russian officials have reported more than two dozen drones have targeted the Moscow region alone.

Throughout the summer, the intensifying attacks — many of which have been carried out with Ukrainian-made drones — have hit buildings in central Moscow’s financial district and a supersonic bomber aircraft stationed south of St. Petersburg.

Though the scale of the destruction pales in comparison to the devastation wrought by Russia’s aerial attacks in Ukraine, the assaults have caused damage and disruption.

American officials have said the drone attacks are intended to demonstrate to the Ukrainian public that Kyiv can still strike back, even as its counteroffensive to reclaim Russian-occupied territory in the south and east of Ukraine moves slowly. Another objective, as top Ukrainian officials have said, is to bring the war home to the people of Russia.

Ukraine also has increased attacks on Crimea, claiming this week that its forces had staged a brief raid on the occupied peninsula and clashed with Russian troops.

But it remains unclear whether such long-distance strikes are having any effect on Russia’s battlefield operations. News reports this week, including from The New York Times, indicated that Ukrainian and American officials have had disagreements about tactics and strategy in the counteroffensive, especially on where to deploy troops.

In southern Ukraine on Saturday, one person died and four others were injured after Russian shelling in Zaporizhzhia, the regional military governor, Yuri Malashko, said on Telegram.

Here’s what else is happening in the war:

  • Jet Collision: Three Ukrainian pilots died on Friday after two combat training aircraft collided in a region west of Kyiv, the Ukrainian Air Force said. Among the victims was Andriy Pilshchykov, better known by his call sign “Juice,” who had been a frequent voice in Western media advocating for the supply of F-16 fighter jets. President Volodymyr Zelensky of Ukraine paid tribute to Juice late Saturday, saying that he had “helped our country a lot.” He said an investigation was underway into what caused the crash and expressed condolences to the families and friends of the victims.

  • Black Sea Corridor: A second cargo ship has sailed from Odesa, according to marine traffic data, traveling through the temporary corridor set up by Ukraine’s government for civilian vessels after Russia pulled out of an agreement allowing Ukraine to export its grain.

    It was not immediately clear what the vessel, which sailed under a Liberian flag and was en route to Bulgaria, was carrying. The temporary corridor, which hugs the western Black Sea coast from Ukraine to Bulgaria, was established to allow passage for civilian ships that have been docked in Ukrainian ports since before Russia’s full-scale invasion. But Ukrainian officials said they were considering using this new route to restart grain shipments, an uncertain option given Russia’s threats to vessels in the Black Sea going to and from Ukraine.

  • Attack on Kyiv: Ukrainian officials said Russian forces launched a wave of missiles toward Kyiv and the surrounding area early on Sunday. Air defense systems shot down four cruise missiles, according to Ukraine’s Air Force. But debris from downed missiles injured two people and damaged 10 houses in the Kyiv region, the local military administration said in a statement.