Eight fire crews tackled a large blaze in a barn at Burgh Castle, near Great Yarmouth.
Local people have been asked to keep doors and windows closed and avoid the area of the barn in Mill Road.
Fire crews from Norfolk and Suffolk received the call at 6.21pm on Friday.
Crews used breathing apparatus and defensive tactics as cylinders were near to the fire.
Once the cylinders were removed from the area, they began scaling down the blaze.
Flames can no longer be seen.
Police are on scene to aid with road closures, and have closed Mill Road.
Appliances from Suffolk Fire and Rescue have left the scene, but those from Norfolk remain.
The continued to dampen down the blaze as of Saturday morning.
Eight pumps from Norfolk attended the blaze.
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