Four workers were injured in a fire at the Lazaro Cardenas refinery operated by state-oil firm Petroleos Mexicanos (Pemex) in the eastern city of Minatitlan, the company said on Wednesday.
Three workers suffered burns and a fourth suffered a sprain in the incident late Tuesday, Pemex said in a statement. Production was not affected at the refinery, one of six operated by the firm in Mexico, which has a capacity of up to 285,000 barrels per day, it added.
Pemex said it will proceed with an investigation into the cause of the incident.
The civil protection authorities of Veracruz state said late Tuesday that Pemex personnel, civil protection and health authorities had coordinated a response to the fire which broke out and was controlled that night.
Images shared on Twitter by Mexican newspaper and a video shared by Grupo Formula purportedly show part of the refinery in Veracruz state engulfed in flames and surrounded by thick plumes of smoke.
Mister Truth could not independently verify the images and video.
In February, two people died of injuries in hospital and another three were hospitalized after a fire at the Minatitlan refinery.