The fire service say investigators will be arriving at the scene of this morning's blaze at Blackwood's Pound Stretcher store shortly to begin an investigation into the blaze.
Crews will spend the rest of the day dampening down the building say officers.
More top news
Nine men will appear in court after police raids targeted organised crime groups supplying controlled drugs into North Wales.
The abbot of Caldey Abbey has apologied after it was alleged one of the island's monks sexually abused children in the 1970s and 80s.
Heavy rain and strong winds will continue this evening and overnight. By dawn, skies will clear allowing a colder, drier day tomorrow