MOL Group Olefin-1 unit explosion in Tiszaújváros kills one worker and injures nine

A pipeline explosion occurred at the MOL Group petrochemical facility in Tiszaújváros, Hungary, during the restart of its Olefin-1 unit on May 22, 2026. The incident triggered a major fire that was later brought under control. The accident resulted in the death of one worker, while nine others sustained injuries and were hospitalized. Preliminary findings suggest the blast may have been linked to a malfunction in a compressor system during the process of bringing equipment back online, though the exact cause remains under investigation. The Olefin-1 unit is a major steam cracker with ethylene production capacity of approximately 370,000 metric tons per year. Other units at the complex continue to operate normally.