An explosion at Rosneft’s petrochemical plant in Angarsk in East Siberia has killed one worker. According to preliminary reports, the explosion was caused by a hydrogen leak at a high-pressure pump. The blast destroyed a total of 120 sq mts of the roof at the facility. Any danger to the environment due to a gas leak has been ruled out. The plant is one of Russia's largest petrochemicals facilities in the region. Prosecutors have launched a criminal probe. A criminal case has been opened on suspicion of violation of safety rules which led to a loss of human life.