A massive fire has broken out at one of Indonesia’s biggest oil refineries after an explosion turned the sprawling complex into a raging inferno. Firefighters battled to contain the fire at the Balongan refinery in West Java, operated by the state oil company, Pertamina, as towering plumes of black smoke rose into the sky. “There was a very loud sound and I thought it was a hurricane,” Rumaji, a local resident, said. “I looked outside and the fire was huge. The flames were shooting into the sky.” At least five people were seriously injured and about 1,000 people living nearby were evacuated after the fire broke out early on Monday morning at a storage tank and then spread to other containers. The local disaster agency said one person died from a heart attack after the explosion. About 15 people were slightly injured and authorities said they were checking on the whereabouts of three others. “To prevent the fire from spreading we’ve shut down operations ... and are putting our efforts into handling the blaze,” Pertamina’s president director, Nicke Widyawati, said. The cause of the fire was not clear, but the company said the blaze broke out during a lightning storm. By Monday afternoon the disaster agency said the blaze had been contained but was yet to be extinguished. Pertamina said it did not expect the fire to cause fuel supply disruptions due to its high volume of stock. “There’s more than enough national supply,” said Mulyono, Pertamina’s logistics and infrastructure director, who like many Indonesians goes by one name. Greenpeace called for a an investigation into the accident. “These kinds of dangerous incidents have been happening repeatedly in fossil fuel industries,” the environmental group said. “If there’s any evidence of negligence or a violation of [health and safety] procedures, the government must file criminal charges to hold Pertamina accountable.” The plant, which opened in the mid-90s and can refine about 125,000 barrels of oil a day, is about 120 miles (200km) east of the capital, Jakarta.