Sixty tonnes of wood falls into North Sea
Coastguards have warned vessels sailing off the Norfolk and Suffolk coast to watch out for 60 tonnes of cargo which fell off a ship.
The cargo of wooden planks fell overboard from a Norwegian ship 55 miles east of Lowestoft in heavy seas.
Great Yarmouth coastguard said it was liaising with its Dutch counterparts to find the planks.
Lighter, smaller vessels could face "significant damage", a spokesman for the coastguard said.
Watch manager at Yarmouth coastguard, Mario Siano, said: "Individual planks if they come adrift of even larger bundles may not present too much of a threat to larger vessels in the regular shipping lanes.
"But impacting on smaller craft and certainly leisure vessels may cause significant damage.
"There is of course a danger in heavy seas the bundles could split and cause the wood to raft together creating a bigger 'patch'."