What happened

Equipment failure and the resulting rupture of a pump caused a major fire in the AV3 atmospheric-vacuum distillation unit at MOL's Danube Refinery. Facility and municipal firefighters contained the blaze; no injuries were reported, and mobile-laboratory measurements did not find concentrations above health limits around the site. AV3 was severely damaged, while unaffected refinery units were progressively restarted. Prime Minister Viktor Orbán publicly floated an accident, malfunction or external attack as possibilities while the investigation was still under way, despite MOL saying it had found no sign of external tampering. MOL's completed internal investigation subsequently excluded gross negligence, wilful misconduct and external impact, and identified equipment failure followed by a pump rupture as the cause. MOL expected the incident to reduce 2025 crude processing by about 500,000 tonnes and forecast completion of AV3 repairs in the third quarter of 2026. This is recorded as an industrial accident, not sabotage.

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.