Explosion at MOL petrochemical site in Tiszaujvaros kills one, injures nine during restart work

A fatal industrial accident at MOL Group’s petrochemical complex in Tiszaujvaros has underscored the risks that can accompany maintenance and restart work at large-scale chemical facilities. One person died and nine others were injured after an explosion occurred while activities were underway to restart a production unit.

Explosion during restart and life-extension work

The incident took place at MOL Petrolkemia’s Olefin 1 facility while maintenance and life-extension works were being carried out. Preliminary information provided by company officials indicates the production unit was not operating at the time of the accident. Early findings suggest the blast was hydrocarbon-related and occurred within a pipeline system.

Emergency response and condition of the injured

Emergency services received reports of the explosion at about 8:45 AM. Firefighters brought the blaze under control roughly two hours later. Authorities confirmed that one person lost their life. Among the nine injured, one remains in critical condition, four suffered serious injuries, and four others sustained lighter burns.

Company statements and safety actions

MOL Chief Executive Officer Zsolt Hernadi said there is currently no evidence of external interference and characterized the event as an industrial accident. He added that emergency gas flaring procedures were activated immediately after the explosion and that the affected production unit was shut down as part of standard safety measures.

Investigation ongoing; no threat to nearby residents

Investigations into the cause of the explosion are now underway, with state authorities working alongside company specialists together with government experts. Local media reports indicated that initial information pointed to a pyro-gasoline pipeline as a possible source of the blast. Disaster management authorities also said the incident did not pose a threat to nearby residents, despite large amounts of black smoke rising from the facility after the explosion.

Site significance for Hungary’s chemicals sector

MOL’s petrochemical complex in Tiszaujvaros is described as one of Hungary’s most important industrial sites, producing olefins such as ethylene and propylene, along with plastics, synthetic rubber and polyol products. The facility recently expanded with a new polyol production plant that entered operation in 2024.

The immediate focus remains on determining what triggered the hydrocarbon-related explosion within the pipeline system during restart preparations, while regulators assess compliance with safety procedures around maintenance shutdowns and re-start operations.