More people have been arrested following police raids on suspected drugs houses in Northamptonshire.
Officers carried out warrants in Corby over a three-day period starting on Monday.
So far 18 people have been arrested on suspicion of conspiracy to supply drugs, nine of those have since been charged.
Seven people have been released on police bail and two are being questioned in custody.
The work involved 50 officers and followed months of investigation under Operation Guardian.