Almost 1.5 tonnes of copper cable was stolen from a business at Thornton on Tuesday night.
Police are appealing for public assistance as they investigate the incident where they believe a number of people stole black-rubber cable, valued at about $30,000, from an address on Glenwood Drive at Thornton.
The theft occurred around 10.30pm.
Detectives from Port Stephens-Hunter Police District have launched an investigation into the incident. Police believe the offenders used a vehicle to remove the cable and say the materials may be sold to scrap metal dealers. They are urging local businesses to be vigilant and report any suspicious behaviour.
If the copper cables are burnt, police say they can emit plumes of thick, black smoke.
Detectives are asking anyone who may have noticed anything suspicious in the area at that time to contact Crime Stoppers on 1800 333 000.
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