Swiss authorities have determined that small fireworks attached to beverage bottles likely caused a fire in a bar's basement.
The fireworks are believed to have ignited foam insulation on the ceiling, which subsequently led to a larger blaze.
Swiss authorities have determined that small fireworks attached to beverage bottles likely caused a fire in a bar's basement.
The fireworks are believed to have ignited foam insulation on the ceiling, which subsequently led to a larger blaze.