Derbyshire Fire and Rescue Service has reportedly begun an investigation with police into the cause of a fire that caused extensive damage at a former chocolate factory in Belper:
A spokesman told the Derby Telegraph:
All we know is there has been an explosion in the building.
We think it has been caused by a gas cylinder. At this point, we are waiting for an investigation unit to turn up to determine whether it was arson.
These investigations will be carried out in conjuction with the police. No-one has been injured but the building is 100% damaged.
More top news
The advertising watchdog has ruled the "beach body ready" campaign was not offensive or socially irresponsible.
Britain is set for the hottest day of the year today, with temperatures forecast to hit up to 34C (93F).
The Airports Commission is to publish its report and recommendations on whether an extra runway should be built at Gatwick or Heathrow.