Tasmania Police Operation Alert commenced earlier this year targeting the organised trafficking of illicit drugs including crystal methyl amphetamine into Tasmania.

Last week members of Northern Drug Investigation Services, supported by Northern Criminal Investigation Branch, simultaneously executed a number of search warrants at addresses in the Launceston area.

Detective Inspector Craig Fox said the illicit drugs seized by police during Operation Alert have a potential street value of about $350,000 and include:

A 31-year-old Devonport man, who police allege is a senior member of the Outlaws motorcycle gang, has been charged with trafficking in a controlled substance.

A 38-year-old Newstead man arrested on November 13, has been remanded in custody after appearing in court on charges including trafficking in a controlled substance and breaching a firearms prohibition notice.

Several others will appear in court at a later date, police say.

Detective Inspector Craig Fox said police remained committed to targeting the supply of illicit drugs into Tasmania.

"Criminals involved in the manufacture, importation and distribution of drugs in Tasmania are on notice," he said.

"We are committed to identifying you through aggressive targeting strategies and bringing you before the courts and opposing your bail when appropriate.

"We will continue to monitor sea, air, mail and freight ports, and we will continue to detect, disrupt and deter the importation of illicit drugs into Tasmania."