Ukraine's Operational Command South said this in a post on Facebook, according to Ukrinform.
"In the Black Sea, an enemy grouping of ships has been increased to 11. The presence of missile carriers has increased to four surface ships. Accordingly, the total likely volley of Kalibr missiles may reach 32," the report said.
Five Russian warships, including one of them armed with Kalibr missiles, were on combat duty in the Black Sea on May 3.