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
Aled Owen Matthews was jailed for possessing over 4,000 indecent images of children.
An inquest into the death of 18-year-old Cheryl James hears recruits at Deepcut Barracks were left "running around" taking illegal drugs.
The Welsh government appeared to poke fun at Health Secretary Jeremy Hunt by offering a "warm welcome" to junior doctors working in England.