Copenhagen airport, the busiest in the Nordic region, was closed for four hours last night while Oslo airport shut down operations for three hours after large drones were spotted flying close by. Ukrainian President Zelensky claimed Moscow was behind it, referencing "Russia's violation" of Nato airspace in Copenhagen on in a social media post. Danish police said earlier that two or three large drones had been seen flying near Copenhagen's airport, closing it to all traffic. Nato allies scrambled Italian F-35s to repel the Russian jets. And it was followed by a Russian drone overflying Romania for 50 minutes on Saturday.