Merseyside Police have arrested an eighth man following dawn raids in Rock Ferry and West Derby.
He's being questioned on suspicion of possession with intent to supply controlled drugs.
Four men arrested earlier have been released on bail. Two have been released without charge and another remains in custody.
More top news
Boxer Amir Khan awarded a Doctor of Letters by Manchester Metropolitan University for his sporting success and charity work.
A charter plane reportedly carrying Manchester City captain Vincent Kompany skidded off a runway, air investigators have blamed pilot error
Burnley Football Club can confirm that a supporter has been given an indefinite club ban following an incident of racial abuse.