The Sergei Kotov is one of four patrol ships completed for the Russian Navy’s Project 22160. It had previously been attacked by Ukraine in September last year. Ukraine said the cost of the sunken Sergei Kotov ship was $65m (£51.2m), adding that it was hit near the Kerch Strait, which separates Crimea from Russia. Ukrainian intelligence says seven people have been killed and six more injured after a Russian patrol ship was hit and sunk in a sea drone attack. How will Russia respond ?
