An explosion at the Cerredo mine in Asturias on Monday has tragically resulted in five miners’ deaths and four injuries, prompting an investigation into the events leading up to the disaster. Reports indicate that several workers experienced mild symptoms of gas poisoning days prior, which may suggest the presence of grisú gas.

Grisú is an odourless gas that can lead to suffocation and explosions, posing significant risks in enclosed spaces like mines. Investigators are scrutinising the ventilation systems in place, which reportedly only operated during workdays, limiting effectiveness on the weekend before the explosion.

Additionally, union representatives expressed concerns regarding worker safety in smaller mining operations, where organisations lack presence due to fewer employees. The circumstances surrounding this tragedy have led to calls for a comprehensive review of working conditions and safety measures at the mine.

Meanwhile, Blue Solving, the company operating at Cerredo, has denied any wrongdoing, insisting that safety protocols were followed. The incident has also cast uncertainty on plans to reopen another mine in León, originally expected to produce coal and higher-grade graphite for industrial use.