A devastating explosion at the Zarréu mine in Asturias, Spain, has claimed the lives of five workers and left four others seriously injured.

The incident, one of the worst mining accidents in decades, has sparked grief and questions about safety protocols.

Investigators suspect a grisú gas explosion but are probing deeper into the cause.

The mine, operated by Blue Solving, was only authorized for material removal and mineral analysis, not coal extraction.

Despite passing a safety inspection in September, concerns about equipment like gas detectors have emerged.

Local communities in Asturias and León mourn the victims, with tributes and support pouring in.

Authorities have suspended operations and launched a full investigation into the tragedy.