MUNICH (AP) — Germany’s Munich Airport reopened Saturday morning after authorities shut it down the night before for the second time in less than 24 hours after more suspected drone sightings, the airport said in a statement. The closures are the latest after mysterious drone overflights in the airspace of European Union member countries. The airport, one of Germany’s largest, reopened gradually beginning at 7 a.m. local time (0500 GMT) Saturday. The incident was the latest in a series of incidents of mysterious drone sightings over airports as well as other critical infrastructure sites in several European Union member countries. European authorities have expressed concerns that they’re being carried out by Russia, though some experts have noted that anybody with drones could be behind them.