Emergency services were called after a suspected Second World War bomb was discovered on a north Norfolk beach.
A spokesman for the Maritime and Coastguard Agency said: "At 3.20pm on October 2 HM Coastguard was called to assist with a report from a concerned member of the public of a suspected ordnance at Cart Gap, Happisburgh.
"Bacton coastguard rescue team and a senior coastguard operations officer were sent and Norfolk police were also on the scene.
"The EOD (explosive ordnance disposal) team attended and confirmed it was not an ordnance."
A spokesman added that the piece of metal, which was described as a seven-inch circular disc, was taken away by the team.
Phil Cockell, from Norwich, was walking on the clifftop about 5pm.
He said: "A number of police and coastguard staff attended what looked like a sea mine uncovered on Happisburgh beach.
"Clifftop walkers were warned away from the area."
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