Explosion sparks huge fire at an Iowa Quaker Oats plant billed as the world's largest mill, but nobody is hurt

Flames burst through shattered windows at the Cedar Rapids factory on Saturday, sending a thick column of dark smoke into the sky above the site. Emergency crews responded as the fire swept through the building and workers were evacuated. Quaker Oats promotes the plant as the world's largest milling facility. The cause of the explosion has not been determined.

Video footage captured dense black smoke hanging over the Cedar Rapids site.

Officials described the blaze as 'dynamic' as it tore through the building.

Authorities have not yet established the full circumstances or confirmed the scale of the damage.