Ukrainian forces shot down a barrage of 20 Iranian-made drones launched by Russian forces early Thursday, with debris falling over four districts of the capital city and wounding two people, as well as destroying several homes.

The attack came soon after the close of the NATO summit, which saw increased security guarantees for Ukraine but no plan for membership. Russian President Vladimir Putin reaffirmed on Thursday that Ukraine's membership in NATO is unacceptable for Moscow, citing increased security threats for Russia. “It would raise the threat for Russia's security,” Putin said in televised remarks.

“It wouldn't increase Ukraine's own security, and, more broadly, would make the world more vulnerable and lead to more tensions on the international arena.” Two people were hospitalized with shrapnel wounds, and rescuers extinguished fires in a 16-story building and a non-residential building, according to the Interior Ministry.

Debris from the drones also smashed into the frontage of a 25-story apartment building. The latest attack in Kyiv follows reports of the death of Lt. Gen. Oleg Tsokov, a senior officer leading Russian forces against Ukraine's counteroffensive in the south of the country.

Tsokov reportedly died when the Ukrainian military struck the city of Berdyansk on Tuesday with U.K.-supplied Storm Shadow missiles. Volodymyr Motus, a 22-year-old resident of the 25-story building, described the aftermath of the attack. “I was in my apartment and suddenly I heard a boom, that's all. Then the alarm went off and I went down to the shelter,” he said. “I saw some people were injured, but they were all alive.”

Meanwhile, the Ukrainian military also intercepted two Russian cruise missiles, while another was not intercepted and caused an unknown amount of damage. The government of the region of Khmelnytskyi in western Ukraine reported that a cruise missile was intercepted over the region, with no casualties.

Ukraine's human rights chief Dmytro Lubinets wrote on Telegram, “It should be explained that each 'air alarm' in Ukraine is like playing Russian roulette... It's unknown the number of people who could be affected, and it is uncertain from which part of Ukraine bad news about the strike of an enemy drone or missile will come.”

At least three civilians were killed and 38 more sustained injuries in Ukraine over the past 24 hours, Ukraine's presidential office reported on Thursday morning. In the partially occupied Donetsk region, Russian forces targeted 13 cities and villages under Ukrainian control with aviation, missiles and heavy artillery.

In the partially occupied Zaporizhzhia region, the number of wounded by drone debris on Wednesday rose to 21, and fires broke out in the city of Kherson after Russian shelling. In Moscow, Putin said that Western weapons deliveries to Ukraine would not change the course of the conflict, and that foreign tanks had become “priority targets” for the Russian army.

He also threatened to suspend Russia's participation in a U.N.-brokered agreement that has allowed the export of Ukrainian grain from the Black Sea ports if the West does not meet Russian demands. Russia's missile attacks on Ukraine have become an all too frequent occurrence in the almost 17 months of the war.

NATO's security guarantees are a welcome development, but without a clear path for Ukraine to join the alliance, Putin's threats remain a harsh reality.