Officials say Munich airport has been temporarily shut down after a string of drone sightings in the area. Airport operators say Germany’s air traffic control restricted flights at the airport shortly after 10 p.m. Thursday and then halted them altogether. They say 17 flights were unable to take off, affecting almost 3,000 passengers. Fifteen arriving flights were diverted to three other airports in Germany and one in Vienna, Austria. The incident comes during a series of incidents of mysterious drone sightings over airports and other critical infrastructure sites in the region.