PORTLAND — Members of Green Day announced Monday that a rehab stint by lead singer Billie Joe Armstrong is prompting them to cancel a club tour this year and postpone several concerts early next year, including a show scheduled for Jan. 25, 2013, at the Cumberland County Civic Center in Portland.

Officials at the civic center said they have not gotten any information about the postponement yet. Tickets for the Jan. 25 show at the civic center are selling for $59.50, general admission.

Armstrong entered a substance abuse rehab program in September. In a press release Monday, Green Day bassist Mike Dirnt said that while Armstrong is doing well, the band felt it would be better for him if the current slate of shows was canceled and future shows – more than two dozen scheduled for January and February – were postponed.

“Obviously, the timing for this isn’t ideal, but Billie Joe’s well-being is our main concern,” said Dirnt in a statement. “We are happy to say that Billie Joe is doing well, and we want to thank you all for the outpouring of support and well wishes that we have received, and we can’t wait to see you all again soon.”

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