The drones carried no missiles, and some landed hundreds of kilometers from the border. They were clearly meant as a NATO provocation and weren't just accidentally detouring from a Ukrainian target.
There is the possibility that they were electronically hacked, by Ukraine or NATO or etc., but that would mean that Russian drones can be hacked.

DIE WELT
„Höchstwahrscheinlich absichtlich“: Brisante neue Details zum Drohnen-Vorfall in Polen - WELT
Am Mittwoch hat das Eindringen von mehr als 20 russischen Drohnen in den Nato-Luftraum für internationale Aufregung gesorgt. Nun wurden Nato-inter...
