MINNEAPOLIS (WCCO) — Fans of Nickelback — prepared to be bummed.

The Canadian rockers have canceled the remaining dates of their North American tour due to a medical emergency.

Live Nation says singer Chad Kroeger needs surgery after a cyst developed on his voice box.

Their July 25 concert at Minneapolis’ Target Center is one of the shows on the chopping block.

For refunds, contact the site of purchase. Fans who bought tickets on AXS.com will automatically receive refunds back to their credit or debit cards.