Efforts have been started to extinguish the fire which broke out at 15:00 local time on Monday, the public relation department of the Aftab Oil Refining reported.
Reportedly, four individuals have been injured.
The fire was extinguished at 17:00 local time, a provincial official said.
The incident has caused no casualties, Mehrdad Hassanzadeh added.
Aftab Oil Refining, which was founded in 2007, is regarded as one of the largest Iranian exporters.
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