Ecstasy pills discovered in Hobart mail

About 3000 ecstasy tablets mailed in packages to Hobart have been seized by police as part of a national crackdown.

The drugs, worth about $250,000, were picked up by random screening of post coming into Tasmania.

Detective Inspector Colin Riley told reporters on Wednesday the MDMA was discovered in two parcels last week.

Interstate and Tasmanian officers targeted mail centres, freight centres and airports under Operation Vitreus and screened more than 750 cars crossing Bass Strait on the Spirit of Tasmania.

Police also found a replica military rifle and a rifle with a scope on two different properties in the state.

Some of the drug seizures were linked to bikie gangs.

"As it occurred, some of the seizures did relate to associates of OMCGs that were detected last week," Det Insp Riley said.

Four people are now facing drug charges.