Irish rockers U2 are reteaming with long-term collaborators Brian Eno and Daniel Lanois for help with their new album. The former Roxy Music star and Lanois famously produced the band's breakthrough fifth album, The Joshua Tree, but they've been invited into the studio this time to help pen lyrics for a follow-up to 2004's How To Dismantle An Atomic Bomb. Writing on U2's official website, drummer Larry Mullen says, "It's the first time we've worked with Brian and Dan in a purely songwriting capacity. So it's very different, quite experimental and kind of liberating because of that." The band are currently working on their new material in Morocco, and frontman Bono adds of the group's progress, "We have no plans for the music yet. We're just going to make it until we can't not put it out!"