Crews still remain at a burger factory in Suffolk badly damaged by flames which have now been extinguished.
The fire at Wessex Foods, in Lowestoft, broke out on Sunday evening and nearby residents reported hearing explosions.
More than 100 firefighters and two air support units worked through the night. Wessex Food processes mince and burgers at the factory and has 150 staff.
Flames threatened a petrol station, buildings on a nearby retail estate and a community church.
Local ponds were used to provide additional water to fight the flames.
Crews have extinguished flames underneath the rubble of the building and have checked there are no more "hotspots", the fire service said.
Kevin Burden, of Suffolk Fire and Rescue Service, said the design of the building had given crews some difficulty.
"The building is designed to keep food stuffs cool so there's a large number of rooms each of which is well insulated and this means the area burns readily.
"They then collapse leaving the fire to burn underneath the rubble of the building structure."