Ukraine’s human rights ombudsman urged international organizations Sunday to respond to a claim that several Ukrainian prisoners of war were executed in Russia’s Kursk region, where Kyiv had launched an incursion in August.

DeepState, a Ukrainian battlefield analysis site close to Ukraine’s Defense Ministry, said Russian troops shot and killed nine Ukrainian “drone operators and contractors” on Oct. 10 after they had surrendered.

Dmytro Lubinets said on Telegram that he sent letters to the United Nations and the International Committee of the Red Cross regarding the claim, calling it “another crime committed by the Russians.”

Earlier this month, Ukraine’s Prosecutor General’s Office of Ukraine said Russian troops had killed 16 captured Ukrainian soldiers in the partially occupied Donetsk region.

There was no immediate response from Russian officials.

Meanwhile, the Ukrainian air force said Sunday that its air defenses had shot down 31 of 68 drones launched at Ukraine by Russia overnight into Sunday in the regions of Kyiv, Poltava, Chernihiv, Sumy and Cherkasy. A further 36 drones were “lost” over various areas, it said, likely having been electronically jammed.

The air force added that ballistic missiles struck Odesa and Poltava while Chernihiv and Sumy came under attack by a guided air missile. Local authorities didn’t report any casualties or damage.

Ukrainian President Volodymyr Zelenskyy said Sunday that Russia had launched around 900 guided aerial bombs, more than 40 missiles and 400 drones against Ukraine over the past week.

Zelenskyy appealed on social platform X to Ukraine’s allies to “provide the necessary quantity and quality of air defense systems” and “make decisions for our sufficient range”. Kyiv is still awaiting word from its Western partners on its repeated requests to use the long-range weapons they provide to hit targets on Russian soil.

In Russia, the Defense Ministry said that 13 Ukrainian drones were shot down over three regions of Russia: six each in the Belgorod and Kursk regions, and one in the Bryansk region, all of which border Ukraine.