Fire crews attended a blaze between Walpolce Cross Keys and Terrington St Clement.
The fire started at around 1.30am this morning, October 10, in Sutton Road.
A tall stack of hay bales had caught fire and is still being put out by the crews.
Crews described it as "a large fire", with locals advised to close all doors and windows and avoid the area.
Police from King's Lynn are also on the scene.
The road is still closed in both directions and has been since the emergency services arrived.
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