Two men from Suffolk have been arrested after a stolen winch worth £30,000 and some copper cable, also thought to have been stolen, were found by police.
They were stopped in Lincolnshire following a tip-off by officers across the county border, Norfolk Police said.
Det Supt Nick Dean said he believed a well organised bogus telecommunications team was operating across at least three counties.
The arrests were made as part of Operation Randall.
It is a cross-border crackdown on rural crime involving police forces in Norfolk, Suffolk and Cambridgeshire.
Police are targeting criminals who steal scrap metal, farm machinery, livestock and fuel.