Guitarist Scott Ian tweeted on Saturday (after wrapping up the tour for the band's last album, Worship Music,) "Today @skisum [drummer Charlie Benante] and @TheFrankBello [bassist Frank Bello] are coming over to start writing for the next record. The few skeletons that are rattling around sound vicious! Here we go again my friends. Cheers!"

A day later, Ian updated fans on the progress of the sessions: "New Anthrax coming at ya fast & loud. Can ya hear it? Anyone within 5 miles of my house can."

Joining Ian, Benante and Bello for the weekend writing session was producer/mixer Jay Ruston (Steel Panther, Stone Sour, The Winery Dogs).

This will be the first Anthrax album to feature new lead guitarist Jonathan Donais of Shadows Fall.

The album is tentatively due in 2014.