Twenty-six people have been killed in a huge blaze at a Mexican gas plant near the border with the United States.
"Regrettably, the number of workers who died in this morning's accident in Tamaulipas rose to 26," the state-owned petroleum company Pemex announced on Tuesday.
The dead included four Pemex workers and 22 contractors.
The site is located near Reynosa, a city in the northeastern state of Tamaulipas that sits across the border from the Texas town of McAllen.
A Mexican Red Cross worker said 40 people, most of them suffering from first- and second-degree burns, had been taken to a hospital.
An investigation is underway to determine the cause of the fire.
Drilling contractor Guillermo Lopez said the blaze might have started when a storage tank was being filled by a tanker truck.
"One of the safety valves attached to the supply hose may have failed, creating a spark that turned into two explosions," Lopez said.
Earlier this month, four Pemex workers were injured in a fire at the Madero refinery in Tamaulipas. Another blaze broke out at the same refinery on August 13.
Pemex, once the fourth biggest oil company in the world, accounts for 40 percent of Mexico’s state revenues.