From the article linked above:
Among the targets was the Engels-2 base in in the southern Rostov region, home to Putin's prized Tu-95 and Tu-22 nuclear bombers.
More than 60 explosions were heard in the Rostov region as Russian air defences fended off an attack on Morozovsk military airfield, scene of the heaviest assault.
...
A security source in Kyiv told France's AFP news agency that an attack on the Morozovsk air base in Russia's southern Rostov region had destroyed at least six Russian planes and 'another eight were heavily damaged'.
...
Some 20 Russian personnel were killed or wounded, it was alleged.
Frontline bombers - Su-24, Su-24M, and Su-34 - are known to be routinely based at the airfield. They have been used to strike at Ukraine during the war.
The Su-24 is a tactical bomber akin to the USAF's F-111 (including the variable wing sweep). The Su-34 is a multirole fighter-bomber akin to the USAF's F-15E. Also at the Morozovsk air base are Su-35s, which have been used as fighter escorts for Su-34s flying bombing and ground attack missions.
As to damages, the Ukrainian claims should be regarded as rumor-grade, since their sources are not known (observer drones? spies? somebody's rectum?), pending confirmation, of course.
