Brussels investigators report first findings after blast kills firefighter Olivier

Updated 17 August 2026, 12:00 CEST — BRUSSELS. Investigators examining the double explosion that killed 50-year-old Brussels firefighter Olivier at Treurenberg on Friday, 14 August, have made their first useful findings at the scene, the Brussels public prosecutor’s office told HLN. A forensic autopsy is scheduled for Monday as the authorities work to establish the precise cause of death and reconstruct the sequence of the blasts.

The emergency began after a contractor drilled into a gas pipe inside a building at Treurenberg, near Brussels Central Station and the Parc metro stop. BRUZZ reported that the building was evacuated after the damaged pipe caused a gas leak. Firefighters entered as part of the operation to secure the premises. Two explosions then struck during the intervention, killing Olivier and injuring three colleagues, according to HLN.

The prosecutor’s office has placed the site under investigation and sent technical experts there. Its reference to useful initial findings does not amount to a conclusion about the cause, responsibility or compliance with safety procedures. Those questions remain open. The authorities have not publicly released a complete technical reconstruction, the source of ignition or the autopsy result.

The inquiry now centres on how the gas pipe was hit, how gas accumulated inside the building and what triggered the explosions after the evacuation began. Investigators will also examine available plans, work instructions, emergency communications and the protective measures taken before firefighters entered. No person or company has been publicly accused of an offence.

The death has a direct impact on Brussels’ emergency-service community. Brussels Fire Brigade describes itself as a regional public body with more than 1,100 firefighters, responsible for fires, explosions, hazardous-material incidents and urgent medical assistance across the capital. The service’s own safety framework treats prevention, preparation, intervention and post-incident evaluation as parts of the same risk cycle.

The autopsy and specialist examinations are the next formal steps. Investigators must still determine Olivier’s exact cause of death, the origin of the ignition and whether errors involving building information, drilling work or the emergency response contributed to the disaster. Further updates are expected from the Brussels prosecutor’s office once those findings can be disclosed without compromising the investigation.