Ukraine’s air force claimed on Saturday to have downed a Russian hypersonic missile over Kyiv using newly acquired American Patriot defense systems, the first known time the country has been able to intercept one of Moscow’s most modern missiles.

Air Force commander Mykola Oleshchuk said in a Telegram post that the Kinzhal-type ballistic missile had been intercepted in an overnight attack on the Ukrainian capital earlier in the week. “Yes, we shot down the unique Kinzhal,” Oleshchuk wrote. “It happened during the night time attack on May 4 in the skies of the Kyiv region.” Oleshchuk said the Kh-47 missile was launched by a MiG-31K aircraft from the Russian territory and was shot down with a Patriot missile.