"Kadyrov was suspected to have the coronavirus, he's under medical supervision," the agency's source said.
Chechen authorities have not commented on the issue so far. The Chechen government's press service told media outlet Znak that it "would not be giving out information."
A TASS source corroborated the Interfax report and confirmed that Kadyrov flew to Moscow on Thursday, and was admitted to a hospital with suspicions of COVID-19. Kadyrov's state was "stable", the source said.
Media outlet Baza had previously reported that Kadyrov was flown out to Moscow after showing COVID-19 symptoms. Kadyrov began displaying the symptoms several days ago, after which his condition "began to deteriorate rapidly." Local doctors recommended that Kadyrov be admitted to a Moscow hospital to receive treatment. Baza added that Kadyrov had been diagnosed with lung damage.
A jet with tail number VQ-BVQ, which reportedly belongs to Kadyrov, landed at Moscow's Vnukovo airport at 16:41 on May 21, MBKh Media reported earlier today citing flight tracker Flighware.
Several high-ranking Russian officials have been diagnosed with COVID-19, such as Kremlin spokesman Dmitry Peskov, Prime Minister Mikhail Mishustin, Minister of Culture Olga Lyubimova and Construction Minister Vladimir Yakushev.