The Neptune was in testing when Russia invaded and is now in service.
"With restrictions imposed on the use of donated weapons against targets outside its borders, Ukraine is developing its own long-range strike weapons, one of which appears to have already been used on Crimea, which is fair game even for systems provided by foreign donors.
On Aug. 23, Kyiv used a modified Neptune anti-ship cruise missile to hit a Russian S-400air defense system on the western most part of the occupied peninsula, a Ukrainian defense official told
The War Zone. There are plans, the official added, to eventually strike Moscow and other targets inside Russia - precluded for use by donated weapons - with land attack variants of the Neptune."
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