About 12.5 ounces of ice, five ounces of speed, hundreds of MDMA tablets, ammunition, $175,000 in cash and more than $200,000 in property were among items seized by police in the past week, as part of Operation Alert.

On Tuesday police confirmed an alleged senior member of the Outlaws motorcycle gang was among more than a dozen people who had been arrested as a result of the six-month operation.

Northern Commander Brett Smith said the seizure was expected to make a "sizeable dent" in Launceston's drug distribution.

"This was a long investigation. It was retracted, it was detailed and extensive," he said.

"It just goes to show what hard work will do in order to achieve the results we have."

Launceston's Greenwood Bar and Empire 44 Bar & Nightclub were among a number of properties and venues searched as part of the police sting in Launceston last week.

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.

Detective Inspector Craig Fox said the operation remained ongoing, with more arrests expected.

"The people we've arrested and will arrest in the near future, represent a small minority of people who want to distribute drugs in Tasmania," he said.

"We consider them to be key players in the Launceston community. We still have people to see and searches to conduct ... we won't leave any stone un-turned.

"So anyone who decides they want to deal in drugs in Tasmania, they can expect us to come calling."

Detective Inspector Fox said it was highly unlikely the drugs were manufactured in Tasmania.

Commander Smith said the operation highlighted the link between the commission of property crimes and the illicit distribution of drugs.

"Neither work in isolation," he said.