Three people were killed and more than 100 others were injured on Wednesday after a blast at a Pemex plant.
According to CNN, an explosion at the Petroquimica Mexicana de Vinilo (PMV) facility in the southern state of Veracruz released toxic fumes across the region, prompting evacuations in the surrounding area.
State-owned Pemex confirmed that three workers were killed by the blast and an estimated 136 workers were injured.
Eighty eight of the injured workers remain hospitalized.
The company said on Wednesday that the fire was under control and that there was no risk to nearby residents.
Pemex said it immediately activated security protocols after the blast and closed pipes and valves as it proceeded with the evacuation.
The plant, a joint-venture between Mexichem and Pemex, remains closed.
Pemex added that 2,000 people who had to be evacuated from the nearby area have now returned to their residences.
Pemex officials visited the site early Thursday morning to begin assessing damages.
The company does not yet know what triggered the blast.
The explosion is just the latest accident to strike a Pemex facility.
Three workers were killed in February and several others were injured when a fire broke out at the Abkatun A Permanente processing platform in the Bay of Campeche.