A huge blaze erupted at a Mexican gas plant near the US border on Sept 19, 2012, leaving 26 people dead, 28 injured and seven missing in the worst accident in two years for the state-run Pemex energy firm.
Television images showed tall flames and plumes of smoke billowing from the site, located near Reynosa, a city in the northeastern state of Tamaulipas that sits across from the Texas town of McAllen.
Four of the dead were Pemex workers while the 22 others were contractors, the company said.
Pemex later tweeted that another 21 contractors and seven company employees were admitted to hospital – of those, two were in serious condition.
"Seven workers are still missing," the company added.
A Red Cross worker told reporters earlier that 40 people had been taken to a hospital, with half of them suffering from first- and second-degree burns.