Drug squad officers searched three properties in St Clement and three men aged between 17 and 18 were arrested.
During searches of the addresses police found around £500 in cash and a number of electronic devices were seized so they can be examined.
All three teenagers have been released on police bail pending further enquiries.
Anyone who has information regarding the supply of drugs is urged to contact the States police on 612612 or call Crimestoppers anonymously on 0800 555111.
