Wartime metal structures have been exposed on a beach in Hemsby by the sea.
County councillor Jonathon Childs wrote to the county council expressing his concern for safety.
He said: 'Sand has been stripped away and lots of metal is sticking up. I am aware the sand might recover, but also very worried that someone might get hurt.'
The dunes and beach to the mean high water mark is privately owned by the Geoffrey Watling (Norwich) Ltd and between low and mean high water mark is in the ownership of the Crown Estates.
A county council officer said he would write to both parties to ask if they could do something about it.
The anti-tank defences have been on Hemsby beach for 60 years, installed during the second world war when Norfolk's coastline was vulnerable to invasion.
A spokesperson for The Crown Estate said: 'We are aware of this situation and are in contact with the local council and neighbouring landowner to try to find a solution'
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