The sunken tankers were properties of Rosneft.
The tankers that went down were owned by Rosneft and were transporting mazut and oil fuel to the Kavkaz harbor.
For the preceding half-year, the Volgoneft-212 and Volgoneft-239 tankers have been traveling between the Kavkaz harbor and the wharfs of petroleum refineries on the Volga.
In the last six months, the Volgoneft-212 tanker took on mazut on two occasions at the Saratov Petroleum Refinery. The ship also carried heavy fuel oil (HFO) from the Syzran Petroleum Refinery on a single occasion.
Volgatransneft, the proprietor of the Volgoneft-239 tanker, secured a bid in 2017 to convey Rosneft commodities in a southward direction within Russia until 2022. The agreement for the conveyance of 1.5 million tons of petroleum-based goods was valued at nearly 3 billion rubles, the article mentions.
