After his light aircraft was spotted entering a no-fly zone near the Avord military aerodrome, French flight security made three calls to an aircraft registered as HB-TOR thinking it was Berset’s plane. However, the minister was flying an aircraft registered as HB-TDR and therefore never responded, according to the newspaper SonntagsZeitung.
Eventually, two French fighter jets forced Berset, who was flying solo, to land. After checking his identity he was allowed to continue his flight.