Smoke and fire engulfing a petrochemical plant in Rizhao, east China's Shandong province. The early morning fire yesterday broke out after tanks containing liquefied hydrocarbon leaked, sparking an explosion. The inferno was brought under control by more than 130 firefighters, Xinhua news agency said. No one was hurt, it added. Harmful non-methane hydrocarbon was later detected in some places around the plant, according to the city's environmental protection bureau, adding that the density of the pollutant was dropping.