Inquiries are continuing after police in Douglas seized £40,000 worth of cocaine.
Four people were arrested when officers from the Drug Trafficking Unit raided a house in Willaston yesterday (Thursday).
And another four have been questioned in connection with a separate drugs seizure in Governor's Hill.
Cocaine worth £22,000 was recovered during the raid on a house in Willaston Cresent - the operation caused disruption and residents have been thanked for their patience.
Four men arrested there have been questioned at police headquarters.
Officers say the seizure of cocaine worth £18,000 in Governor's Hill at the weekend is unrelated.
Two local men, a woman and a man from the UK have been questioned and released on police bail.