Eight people have been arrested after police carried out a series of raids across Yorkshire, the North East and Warwickshire.
It was part of a pre-planned operation targeting suspected county lines drugs networks at addresses in Hull, Hessle, Doncaster, Middlesbrough and Rugby.
More than £100,000 in cash was seized, as well as quantities of class A and B drugs and mobile phones linked to their supply, police said.
Det Insp Matthew Grantham, from Humberside Police, said it was a co-ordinated operation involving several forces from around the country.
He said the raids came after extensive intelligence work to identify targets linked to the suspected county lines network.
“We’ve had to work out exactly who does what and what everyone’s role is in the [drugs] operation,” he added.
In East Yorkshire, two men, aged 34 and 45, were arrested at an address on Richmond Road in Hessle on suspicion of being concerned in the supply of cocaine and cannabis.
A 45-year-old man was also arrested at an address on Beverley Road, Hull, on suspicion of possession with intent to supply class B drugs.
Elsewhere, a 30-year-old man and a 29-year-old woman were arrested at an address on Roscoe Street in Middlesbrough on suspicion of being concerned in the supply of class B drugs. The woman has since been bailed pending further inquires.
Two people, a man, aged 44, and a woman, aged 33, were arrested at an address on Begonia Way in Rugby on suspicion of being concerned in the supply of class B drugs and a 34-year-old man was arrested at an address on Warmsworth Road in Doncaster on suspicion of being concerned in the supply of class B drugs.
County lines is the term used to describe drug-dealing networks connecting urban and rural areas, using phone lines across the UK.
Humberside Police said it was committed to disrupting criminal networks and to protecting vulnerable individuals at risk of exploitation through county lines criminality.
