Raids have been taking place across the region this morning in what Durham Police say is one of their biggest crackdowns in 20 years on organised serious crime gangs.
18 addresses were raided shortly before 6 o'clock this morning.
More than 200 officers took part in the raids in Durham and Bishop Auckland, as well as Berwick in Northumberland.
Operation Melrose has taken 6 months of planning and involved specialist teams acting on information received from local people.
12 people were arrested and £10,000 in cash was seized.
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