Police in England are setting up a nationwide task force to tackle what they say is an "explosion" in thefts of metal which is then sold on as scrap.
Church and school roofs, statues and power lines have all been targeted as millions of pounds worth of metal has been stolen.
British Transport Police, which is leading the task force, said the theft of rail signalling copper had become its biggest problem after terrorism.
Police believe the demand for metal in India and China is forcing prices up. Copper is now worth £4,000 a tonne, twice as much as two years ago.
Stolen metals end up with scrap metal dealers who are to be warned against accepting this stolen property particularly now the market has a new robust detection tool.
New hi-tech marking systems; i-Gel and i-Grease with RedDNA™ mean it is easier for Police to identify stolen metals and cables and apprehend suspects due to i-Gel and i-Grease unique tag transference properties.