Sources in Ukraine's Security Services (SBU) say that a massive strike was launched on Wednesday night against the Saki military airfield in Crimea.
Saki — which suffered an extensive attack in August 2022 — is home to Russian combat aircraft.
The sources told CNN that "the SBU and the Ukrainian Navy launched a massive fire strike on the Saki military airfield."
"There were at least 12 combat aircraft (Su-24 and Su-30) and Pantsir MPADS [air defense systems] at the airfield."
"There was also a training base for operators of [Iranian-made] Mojaher UAVs. These are the drones used by the Russians to coordinate their own air attacks and as a combat attack drone."
"The strikes of the Security Service and the Navy hit the target and caused serious damage to the occupiers' equipment. To defeat the enemy, drones were used to overload Russian air defense, and then Neptune missiles were launched," the sources told CNN.
Neptune missiles are Ukrainian-made and were used to sink the Russian warship Moskva last year.
Some background: Since 2014, the Saki Air Base has been home to a Russian naval aviation regiment, part of Russia’s Black Sea Fleet, according to the state-run RIA-Novosti news service.
Russia annexed Crimea from Ukraine in 2014, after Russian President Vladimir Putin sent military forces into what was then an autonomous region of southern Ukraine with strong Russian loyalties.
Thousands of Russian-speaking troops wearing unmarked uniforms poured into the peninsula in early March that year. Two weeks later, Russia completed its annexation of Crimea in a referendum slammed by Ukraine and most of the world as illegitimate.
CNN's Brad Lendon contributed to the reporting in this post.