As a result of drone attack on Port of Kavkaz in the Krasnodar Territory, 30 fuel tanks sank, which poses a significant threat to the environment. The situation is complicated by the fact that authorities would not disclose the type of fuel that is in the tanks; and therefore it is impossible to take measures to prevent the consequences, the environmentalists, Valery Brinikh and Evgeny Vitishko, have stated.