Three out of four of Moscow's airports shut to air traffic on Sunday after Ukraine launched dozens of drones at the Russian capital, authorities said.The attacks led to multiple flight delays, including at Moscow's second-busiest airport of Vnukovo, Russian media reported.Ukraine, which has itself endured waves of Russian drone strikes throughout the nearly four-year war, did not immediately comment.A spokesman for Russian aviation regulator Rosaviatsia announced the closures between 1300 GMT to 1400 GMT.