Why did Germany blame Russia for the airport drone?

Germany's foreign minister, Johann Wadephul, publicly attributed a failed drone sabotage attack near Ukrainian cargo planes at Leipzig/Halle Airport to Russia, marking the first time Germany has made such an attribution over an incident of this kind [1]. In response, Germany moved to close Russian diplomatic facilities, including the consulate in Bonn, in what was described as a sharp escalation in relations between the two countries [1]. The stories don't give the specific evidence behind the attribution, only that the accusation was made and followed by this diplomatic action.