This aerial photo shows the blaze raging on at Balongan refinery in Indramayu, West Java, on Monday. AFP
A massive blaze broke out on Monday at one of Indonesia's biggest oil refineries after a huge explosion turned the sprawling complex into a raging inferno.
Firefighters battled to contain the fire at the Balongan refinery in West Java, operated by state oil company Pertamina, as towering plumes of black smoke rose into the sky.
About 20 people were injured, including refinery workers and several villagers who suffered burns while passing through the area. Around 1,000 people from a nearby village were evacuated after a massive fire broke out, the local disaster mitigation agency said.
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"There was a very loud sound and I thought it was a hurricane," one local resident, Rumaji, told AFP.
"I looked outside and the fire was huge. The flames were shooting into the sky."
Pertamina officials said there was lightning and heavy rain at the time the fire broke out. AFP
The local disaster agency said one person had died from a heart attack after the explosion.
The cause of the fire was still being investigated, he said at a news conference. Pertamina officials said there was lightning and heavy rain at the time the fire broke out.
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 in a statement.
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.
"So people don't need to panic."
Greenpeace called for a probe 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," it added.
The sprawling plant -- which opened in the mid-nineties and can refine some 125,000 barrels of oil a day -- is about 200 kilometres (120 miles) east of the capital Jakarta.
About 950 nearby residents had been evacuated, Pertamina said, with videos shared on social media showing huge flames engulfing the 125,000 barrels per day facility, while a large explosion can be heard.
The KM Santika Nusantara was travelling between Indonesia's second-largest city of Surabaya and the town of Balikpapan on Borneo island when it caught fire on Thursday evening.
The inferno burned several houses, caused people to flee in panic and forced the evacuation of residential areas near the depot run by energy firm Pertamina in north Jakarta, officials said.
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