Around one thousand pounds worth of cannabis has been found during police searches in the Foyle area.
PSNI sniffer dog Rosie was used to help uncover the drugs.
The search was a result of concerns voiced by local residents.
Officers have asked anyone who knows about drug activity in their area to get in contact.
Search operation under way after reports of man going overboard from ferry
Sentencing Bill, including Charlotte’s Law, to be introduced shortly: Naomi Long
Man dies following crash between car and van in Hillsborough
Woman dies in Cookstown road crash
Extra £400m to support health and education in Northern Ireland