Note that this isn’t a claim that anyhting has been shot down - just a report that another flight comprising a SU-35 escort and 2 Su-34 bombers has been engaged and awaiting confirmation of the result.
There has just been a combat use of anti-aircraft guided missiles against two 🇷🇺Russian Su-34 fighter-bombers and a Su-35 fighter in the eastern direction, — Commander of the Air Force of 🇺🇦Ukraine Oleschuk.