A fire at a crude oil distillation unit at a refinery in the central Iranian city of Isfahan on Saturday injured four people, the official IRNA news agency reported.
A senior official at Isfahan governorate said two of the injured were firefighters, adding that the fire had been extinguished, the semi-official Fars news agency reported.
The official said pipes at the entrance of unit 3 of the refinery caught fire. He did not say what caused the pipes to catch fire.
The semi-official ISNA news site said the unit that caught fire had been under repair.
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