Punk band Green Day have called it quits on their 2012 and 2013 arena tour dates.
Frontman Billie Joe Armstrong checked into rehab last month with substance abuse problems.
Bass player Mike Dirnt said that "Billie-Joe is the band's main concern" before they decide to hit the road again.
Bille-Joe is said to be doing well after a meltdown in Las Vegas, and the band are keen for their frontman to recover as quickly as possible.
Meanwhile, the band's third album installment, Tre, will be available a month ahead of schedule on December 11.
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