What happened

A brief fire appeared outside a vacuum-residue storage tank at Pemex's Olmeca refinery in Dos Bocas shortly after midnight, during scheduled steam-emptying and controlled-venting maintenance work. Pemex said the flame was contained immediately using standard safety procedures, with no injuries and no lasting disruption to operations. This was the latest in a series of safety incidents at the refinery in a short period. This was an accidental industrial incident, not an attack.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.