A blast that partially destroyed the roof of a large grain store was caused by a rare "dust explosion," a fire services has said.
BBC Newsreports the explosion at Tilbury Port in Essex, England, on July 3 was described as "like a bomb going off" with flames 246 feet high.
Essex Fire and Rescue said the cause of the fire was recorded as "accidental" and no one was injured.
Fire crews remained on site for 20 days extinguishing fires in the grain stores.
