A blaze Friday at the coking plant of the refinery of Mexico's state Pemex in the northern state of Tamaulipas killed one worker and left another 11 wounded, said the oil.
Pemex said the coking plant Madero refinery was in maintenance and operations of the refinery, the smallest of the six Pemex and processes an average of 130,000 barrels per day (bpd) were not affected.
The company did not elaborate on the status of injured workers.
Pemex processes an average 1.24 million bpd in its six refineries.
(Reporting by Adriana Barrera)