(WYMT) - Fans of the late Tom Petty can look forward to some new music.
Tom Petty and the Heartbreakers is releasing a four-cd box set of unreleased material.
Sirius XM announced the collection, titled "An American Treasure" is set to be released this September.
Rolling Stone says the set will include 60 tracks. The tracks will be a mix of studio recordings, live recordings, deep cuts and alternate versions of popular songs.
This will be the rock groups first release, since lead singer Tom Petty's death in October.
Petty died at the age of 66 from an accidental overdose.