On September 21–27 the NATO Baltic Air Policing Detachment was alerted to respond in response to six international flight regulation violations.
On September 21NATO fighter aircraft were scrambled to identify and escort one IL-20 flying from mainland russia and to Kaliningrad without the pre-filed flight plan, with its onboard transponder switchedoff, maintaining radio communication with the regional air traffic control.
On September 21 NATO air policing capabilities were patrolling over the Lithuanian-Belarusian border.
On September 22 NATO fighter jets were dispatched to intercept two SU-30 flying from Kaliningrad and back via international airspace. Their onboard transponders were switched off, the crews had no pre-filed flight plans and were not maintaining radio contact.
On September 24 NATO fighter aircraft identified and escorted three MIG31, one TU-134, one SU30SM, and three SU30M2. The foreign aircraft were flying through international airspace from Kaliningrad to mainland Russia. They had no pre-filed flight plans, the crews were maintaining radio communication but kept the onboard transponders off.
On September 24 NATO fighter jets identified and escorted one SU-35, two SU-30M2 and one IL20 flying from Kaliningrad and back through international airspace. Their onboard transponders were switched off, the crews had no pre-filed flight plans, and were not maintaining radio communication.
On September 26 the NATO fighter aircraft safeguarding the Baltic skies intercepted one SU-24 flying from Kaliningrad and back via international airspace. It had not pre-filed flight plan, the onboard transponder was switched off, and the crew was not maintaining radio communication with the regional air traffic control.