Kirishinefteorgsintez plant of Surgutneftegaz suspended the operation of a key technological node after an attack by Ukrainian drones last weekend, sources told Reuters. It accounts for almost 40% of the refinery's refining capacity, which is about 20 million tons of oil per year. Repairs can take about a month. However, the plant will increase productivity in the remaining areas, which will keep processing volumes at about 75% of the nominal capacity.