Russia decided to withdraw its military aviation from Crimea. It is reported by Business Insider with reference to the NATO secret report of August 22.
“Russia is likely to withdraw its air forces in the Crimea to prevent further attacks from Ukraine,” the report said. It is claimed that six Su-35C fighters and four MiG-31BM interceptors have already been withdrawn from the Crimea.
According to the NATO document, about 32 Russian fighters are still deployed in Belbek. Basically Su-27, but there are several modern Su-35s and MiG-31BM.
At the same time, it is reported that Russia increased the number of its tactical missiles of the Earth-Athos in Crimea in order to withstand attacks from Ukraine, for example, drones.