Fire crews have been battling a blaze at a tyre sales centre in west Norfolk.

The large fire broke out at Discount Tyres in Saddlebow, on the edge of King's Lynn, just after 4am on Friday.

Firefighters from Kings Lynn, Fakenham, Terrington, Massingham, Heacham and Downham Market raced to the scene in High Road and used main and hose reel jets to extinguish the flames.

Aerial images show smoke rising from the buildingAerial images show smoke rising from the building (Image: Supplied)

The Environmental Protection Unit was also mobilised from Sprowston.

One crew is expected to remain on scene until around 1.30pm dampening the building.

Drone images captured from the area show plumes of smoke continuing to rise to the sky hours after the fire began.

Local people have been warned to keep their doors and windows closed as a result.

Discount Tyres confirmed the news of the fire on Facebook at around 7.30am.

"As word is already getting round, please know that we are closed for the foreseeable future due to a massive fire outbreak," the statement said.

"Please do not try to visit us.

"We will update when suitable.

"Thank you for your understanding." 

Crews remain at the sceneFire crews from across the county attended (Image: Supplied)

Dozens of customers and friends have already hurried to offer words of support.

"Such devastating news," one commenter wrote. "As long as you are all safe."

"So sorry to read this - I hope you are all safe," another added. "Thinking of you all and genuinely so devastated for you."

A third shared: "My heart is breaking for you."