KYIV, Ukraine — Russia and Ukraine reportedly launched mass drone attacks at each other’s territories for a second straight day Sunday, one of which apparently targeted a Russian military airport.

At least 35 Ukrainian drones were shot down overnight over three regions in southwestern Russia, the Russian Defense Ministry said in a post on the messaging app Telegram.

A Russian air base hosting bomber aircraft used in the war in Ukraine was among the targets, according to a Russian Telegram channel critical of the Kremlin. The channel posted short videos of drones flying over low-rise housing in what it said was the Russian town of Morozovsk, whose air base is home to Russia’s 559th Bomber Aviation Regiment.

Vasily Golubev, the governor of Russia’s Rostov province, separately reported “mass drone strikes” near Morozovsk and another town farther west, but didn’t mention the air base. Golubev said most the drones were shot down and and there were no casualties. He didn’t comment on damage.

As of Sunday evening, Kyiv didn’t formally acknowledge or claim responsibility for the drone attacks. A major Ukrainian newspaper, Ukrainska Pravda, cited an anonymous source in the security services as saying that Ukraine’s army and intelligence services successfully struck the Morozovsk air base, inflicting “significant damage” to military equipment. It wasn’t immediately possible to verify this claim.

Also Sunday morning, Ukraine’s air force said it shot down 20 Iranian-made Shahed drones launched overnight by Russian troops in southern and western Ukraine, as well as one X-59 cruise missile launched from the country’s occupied south.

A civilian was killed overnight near Odesa, a key port on Ukraine’s southern Black Sea coast, after the remnants of a destroyed drone fell on his house, Ukraine’s military said.

Stepped-up drone attacks over the past month come as both sides are keen to show they aren’t deadlocked as the war approaches the two-year mark. Neither side has gained much ground despite a Ukrainian counteroffensive that began in June.

Russian shelling on Sunday also killed an 81-year-old man in central Kherson, the southern Ukrainian city that was recaptured by Kyiv’s forces last fall, according to the head of its municipal military administration.