Some of the most dangerous weapons deployed in Russia's war on Ukraine are affecting the entire Black Sea region, as naval mines used in the conflict are drifting hundreds of miles away.
Ukraine and Russia share the Black Sea coast with Georgia and NATO members Romania, Bulgaria, and Turkey, which controls the straits that connect the sea to the Mediterranean and beyond.
Since the beginning of the war four mines have floated away from Ukrainian waters. One was found off of Romania's coast and three in Turkish waters. Stray mines can cause significant disruptions to maritime traffic in the region.
All four stray mines detected in the Black Sea so far have been Soviet-made anchor contact mines, which are designed to float just below the surface. They appeared to be in poor condition, which may have made them more dangerous.
Speaking to Deutsche Welle, Johannes Peters, a maritime strategy expert at the University of Kiel, said the Black Sea's salinity combined with the mines' age and condition considerably increases their sensitivity.
It is not clear whether the four mines belonged to Ukraine or Russia. Each side has accused the other of employing them. As of mid-March, there were more than 400 mines in the Black Sea, according to a Russian navigational notice, with about 10 of them already adrift.