Federal authorities have arrested seven people and seized 89 pounds of white heroin at a stash house in Tucson.

U.S. Drug Enforcement Administration officials say "Operation Smack Talk" targeted a large-scale Mexican heroin trafficking organization responsible for moving hundreds of pounds of heroin from Tucson to different West Coast cities.

DEA special agents worked with Homeland Security Investigations and Tucson police to execute a federal search on what they suspected to be a stash house last Friday.

Agents found the heroin hidden inside of a bedroom closet at the Tucson home.

They say the drug was smuggled into Arizona from Mexico by using hidden compartments in cars crossing the border.

Authorities say the seven arrested are facing drug trafficking charges. The arrests were part of an 11-month investigation.