https://www.mercurynews.com/2022/03/29/live-updates-russia-ukraine-trade-naval-mines-accusations/

Russia and Ukraine have traded accusations about the naval mines that have been set adrift in the Black Sea, threatening shipping.

The Russian military has alleged that the Ukrainian military has used old naval mines to protect the coast against a Russian landing and some of them have been ripped off their anchors by a storm and left adrift.