Four people have been arrested in Newark as part of an operation which focus on drugs, violence and grooming teenagers.
County lines refers to gangs who move their drug dealing operations from big cities to smaller towns to make more money.
Quantities of class A drugs and cash were seized along with a machete and a flick knife in Newark last week after police issued four warrants.
Safeguarding was provided to a young child and further support was provided to a vulnerable adult.
The activity was led by police officers and Regional Organised Crime Units (ROCUs) and included the execution of warrants at addresses, visits to vulnerable people at risk of having their homes being taken over by gang members and some taxi firms.
Newark Neighbourhood Inspector, Heather Sutton, said: “We know that county lines exist and that recruiters prey on the most vulnerable in our society, so we welcome the NCA’s support in targeting the area and we are pleased that it’s brought about some positive results.
“We will continue to crackdown on potential activity across Nottinghamshire and ask anyone with any information to call us on 101, even if they have a slightest suspicion that someone vulnerable is being targeted, we can put measures in place to help and protect them.”
Children between 15-17 are the most at risk and both boys and girls are groomed and exploited.
The techniques used included sexual abuse and exploitation, modern slavery and human trafficking, as well as the threat of violence and injury to ensure compliance and silence.
The National Crime Agency (NCA) published its fourth annual assessment into county lines drug supply, vulnerability and harm as 600 people were arrested nationally.
Niki Holland, Director of Investigations at the NCA and County Lines lead said: “We also need to ensure that those exploited are safeguarded and understand the consequences of their involvement. This is not something law enforcement can tackle alone- the need to work together to disrupt this activity and safeguard vulnerable victims must be the priority for everyone.”