Turkish authorites inspect a "mine-like object"

Turkish authorites have warned vessels to stay away as a dive team inspects a "mine-like object"  " . . . the attack from the Rus' in 860 came as a surprise; it was as sudden and unexpected "as a swarm of wasps", https://en.wikipedia.org/wiki/Siege_of_Constantinople_(860) Russia warned that several mines had drifted away from Ukrainian ports.