The Ukrainian military said it hit an oil refinery in Nizhnekamsk, which is about 1,200 kilometres (750 miles) east of the Ukrainian border and has a population of about 240,000. Russian officials didn’t say what the drones targeted, but the city is home to two refineries and a petrochemical plant. Also on Monday, several Ukrainian drones sparked a fire at an industrial facility in the Tyumen region of western Siberia, said Gov. Ukraine’s General Staff said its forces damaged part of a petrochemical complex in Tobolsk, in the Tyumen region. Last month, Ukrainian drones hit a refinery in Tyumen, more than 2,400 kilometres (about 1,500 miles) east of the border with Ukraine.