The NATO military alliance represented by the Belgian Air Force published two photos of Russian Su-34 and Su-24 supersonic fighters on its official Twitter account, followed by a caption that during its one month of patrolling Baltic airspace the alliance conducted 109 flights and performed 8 interceptions, including the encounter with the Russian fighter jets.
The black and white photos of the Su-34 and Su-24 were apparently taken from the lens of a thermal imager, however, the purpose of the detection of the planes from a bordering country was not explained by the alliance.
The Ministry of Defence of the Russian Federation has not yet commented on the incident.
On 17 September, the Belgian Air Force also claimed to intercept Russian Tu-160 and Su-27 fighters over the Baltic Sea, which is enclosed by Estonia, Latvia, Lithuania and some other neighbouring states.
NATO planes have been patrolling Baltic airspace since Estonia, Latvia and Lithuania joined NATO in 2004, as the states were not equipped with their own airplanes suitable for air patrolling.