The blast at the Petroquimica Mexicana de Vinilo (PMV) facility in the Southern State of Veracruz has killed three people, injured more than 100 victims and sent large plumes of dark smoke and toxic fumes across the region.
Veracruz Governor, Javier Duarte told CNN affiliate Televisa that the blast was felt about 10 kilometers (six miles) away and that emergency protocols were put in place, with a number of surrounding municipalities evacuated and schools closed.
PMV is a joint venture between Mexican petrochemicals consortium Mexichem and state oil firm Pemex. Pemex said that 136 plant workers were injured in the explosion, of whom 88 remained hospitalized. A government Twitter account showed photos of plant workers being evacuated from the facility in a convoy.
It is not clear what caused the blast. The blast was only the latest of several incidents reported at facilities linked to the Mexican state oil company in recent years.
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In 2013, at least 37 people were killed in a blast at Pemex’s headquarters in Mexico City, and a year earlier, dozens were killed in a fire at a Pemex gas facility in the state of Tamaulipas.