A UFO reportedly shut down airspace over a Russian city as fighter jets were scrambled amid the chaos. Passenger planes from Pulkovo Airport in St Petersburg were grounded after reports of an mysterious object overhead. AlamyFighter planes were reportedly scrambled amid the chaos[/caption] Russian news outlet Baza reported a UFO had been spotted which prompted the shutdown. It said fighter planes were dispatched to investigate. Officials did not confirm the report – but said the airport was closed until 12pm local time without giving a reason. Flight radar data showed passenger planes being forced to turn back as they approached St Petersburg. It comes after a panic in the US where Washington ordered a slew of unidentified objects to be shot down. Russian authorities have not confirmed the nature of the object – but Baza reports fighter planes have been deployed. Flights are now facing 12 hour delays from Pulkovo Airport. And the chaos comes as Russia continues its disastrous war in Ukraine, with Putin fearing more attacks on Russian soil as Kyiv pushes back.