Bomb disposal squads have set up an exclusion zone around Scapa Flow following the discovery of a torpedo near the wreckage of a historic vessel.

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The German warhead was spotted by survey workers carrying out a study near the HMS Royal Oak on Monday afternoon and is understood to have the fuse and explosive ordnance intact.

HeraldScotland: HISTORY: The HMS Royal Oak was torpedoed at anchor.

A 500-metre exclusion zone has since been set up by coastguard authorities while they wait for Royal Navy Explosives Ordnance Disposal (EOD) teams to arrive on Thursday.

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The Royal Oak was attacked by a German submarine in 1939, leaving more than 800 people dead.