Ukrainian forces have intensified attacks on Russia’s energy infrastructure, hitting some of Russia’s largest oil refinerys over the past four days.

According to estimates from the Ukrainian open-source intelligence project Dnepro Ossint, so far about 16 percent of Russia’s total oil processing capacity has been targeted.

Among the targeted targets is the refinery at Yaroslavl, one of the five biggest refinerys in the country.

The attacks have damaged several processing units, including primary and secondary oil processing installations, which could make it difficult to restore them to function and resume production.

The latest assessment marks significant growth compared to that of November 1st, when analysts estimated that the three hit refinerys constituted 10 percent of Russia’s processing capacity.

With new attacks, this figure has reached 16 percent, according to Dnipro Ossint. /Telegraphy/