Unidentified drones have been spotted over sensitive industrial sites and the U.S. military base in Ramstein, Germany, according to a confidential German security report referenced by the news outlet Spiegel. The report cites multiple sightings on the nights of December 3 and 4. German intelligence services have raised concerns that Germany’s support for Ukraine in its conflict with Russia may make it a target for sabotage attempts. The origins of the drones remain unclear, and both BASF and Rheinmetall have been involved in the sightings.