Germany’s interior minister has warned that the discovery of a drone carrying explosives at Leipzig airport marks “a new level of danger” for the country, as authorities examine whether the thwarted attack could have been planned by a foreign power. The discovery of a small drone carrying explosives at Leipzig airport, a leading shipping and military hub, set off alarm and caused flight diversions on Wednesday morning. A DHL cargo plane that had been forced to abort its landing at the airport then collided with an unknown object in mid-air as it was climbing away from the airport. The drone, a quadcopter that was fitted with an explosive device, was found near a Ukrainian Antonov cargo plane, according to media reports. Separately, Die Zeit reported that Russian secret services were plotting an attack against Stefan Thumann, the head of German drone manufacturer Donaustahl.