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
Three puppy dealers who raked in up to £35,000 a week have been jailed after sick and dying dogs were found dumped in buckets.
High pressure over Scandinavia extends its influence across to the UK keeping things mostly dry and settled for us over the next few days
Official video to preview the 2015 Super League Grand Final at Old Trafford between Wigan Warriors and Leeds Rhinos