Germany’s Munich airport restarted flights on Friday after several drone sightings forced its closure overnight, the latest in a string of similar aviation disruptions across Europe. Munich became the latest to close its airspace on Thursday night after several drone sightings, causing more than 30 flights to be cancelled or diverted and leaving nearly 3,000 passengers stranded. Flights had restarted by early Friday, with flight tracking websites showing planes departing the airport at around 5:50 am (0350 GMT). “Nineteen Lufthansa flights were affected – either cancelled or re-routed – because of the the airport suspension,” the spokesperson said. ‘Drone wall’The drone sightings in Denmark and high-profile aerial incursions by Moscow in Estonia and Poland have heightened fears that Russia’s assault on Ukraine could spill over Europe’s borders.