From the NATO Allied Air Command webpage.

Finland to Launch Week-Long Air Training Drills

During exercise Ruska 21 taking place across Finland from October 4 to 9, 2021, the [NATO Enhanced] Partner country’s air force will train together with the Swedish Air Force aiming at sustaining and developing Finland’s air defence.

In addition to the Finnish F/A-18s, participating aircraft include Hawk jet trainers, Air Force transport and liaison aircraft, an Army NH90 transport helicopter and a Border Guard Dornier Do 228 patrol aircraft. Ground-based air defence units will also join the exercise. The Swedish Air Force will deploy JAS 39C/D Gripen multi-role fighters and an S-100D airborne early warning and control aircraft to the exercise.

Finnish F/A-18 fighter jet
Swedish JAS-39 Gripen fighter jet