Drugs were found in a search of a property in Comber as part of an investigation into a "feud between drugs gangs in North Down", police say.
Properties in the Ards and North Down area have been targeted in recent days, including a pipe bomb attack on a house where four children were inside.
The PSNI said last week that 11 homes across Newtownards, Bangor, Ballywalter and Donaghadee had been attacked.
