Ukraine has confirmed that it hit a Russian oil tanker in the Kerch Strait, a strait that separates the Crimea peninsula from Russia, on Friday night.
"During the night, the SBU (Ukrainian intelligence service, ed.) blew up the 'SIG', an important oil tanker of the Russian Federation that carried fuel for Russian soldiers," the security services said. The Ukrainian maritime drone was carrying 450 kg of explosives.
According to the British Ministry of Defence, the ship was badly damaged by the sea drone attack. Moscow downplays the extent of the damage, but even Russian military bloggers wrote about the severe damage inflicted by the attack.
The attack briefly halted traffic on the Kerch, the 12-mile bridge linking Moscow-annexed Crimea to Russia, as well as ferry transport.