(ANSA-AFP) - FRANKFURT, 04 OTT - Flights resumed "progressively" on Saturday at Munich airport, but delays were expected after a drone scare caused a second shutdown in as many days, affecting over 6,500 passengers, the operator said. Airports in Denmark, Norway and Poland have recently suspended flights due to unidentified drones, while Romania and Estonia have pointed the finger at Russia, which has brushed off the allegations. Munich airport said that on Friday "from 9:30 pm air traffic was restricted and then cancelled due to drone sightings", meaning 23 incoming flights were diverted and 12 bound for Munich were cancelled. Forty-six departures from the airport had to be cancelled or delayed until Saturday, with a total of 6,500 passengers affected. A police spokesman told AFP that there were "two simultaneous confirmed drone sightings by police patrols just before 11 pm around the north and south runways". "The drones immediately moved away, before they could be identified," he added. The first disruption on Thursday caused more than 30 flights to be cancelled there and left nearly 3,000 passengers stranded. It began at 8:30 pm local time when police say drones were spotted in areas close to the airport, including the towns of Freising and Erding. Erding plays host to an airfield used by the German military. Bild newspaper said some of the drones were spotted flying over the facility, although police could not confirm this. The first drones near the airport perimeter were seen around 9:05 pm on Thursday, and then over the airport complex about an hour later. The sightings ended around midnight, but not before causing the closure of both runways. Police helicopters were deployed but "no information is available on the type and number of drones", police said. (ANSA-AFP).