The San Marino-flagged chemical tanker Wine Trader caught fire off Romania's Sulina coast following a suspected drone strike, leaving seven crew missing.

Aerial drone strikes on two merchant vessels just outside Bulgarian territorial waters have left one ship sunk, 11 sailors missing, and NATO allies scrambling.

Ukrainian forces have struck the Russian Black Sea port of Sochi with uncrewed surface vessels for the first time, targeting the support vessel Nefrit.

A Romanian F-16 fighter jet intercepted and destroyed an explosive-laden maritime drone operating near the critical Neptun Deep offshore energy site in the Black Sea.

Romania summoned Russia's ambassador after an F-16 fighter jet shot down a third drone in as many days over the Black Sea.