U2‘s frontman has undergone back surgery today. It is unclear if the group will have to cancel tour dates.

According to U2.com:

Bono has today undergone emergency back surgery for an injury sustained during tour preparation training. He was admitted to a specialist neuro surgery unit in a Munich hospital, and is under the care of neuro surgeon Prof. Dr. Jorg Tonn and Dr Muller Wohlfahrt. Bono will spend the next few days there, before returning home to recuperate.

Once his condition has been assessed further, a statement will be made regarding the impact on forthcoming tour dates.

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