LIMP BIZKIT's manager has told TMZ.com that the band was forced to cancel last night's show in Oslo, Norway after the group's drummer, John Otto, was diagnosed with pneumonia.

Otto is currently undergoing a series of tests to determine the seriousness of his condition.

Earlier in the year, LIMP BIZKIT cancelled its planned U.S. summer amphitheater tour in favor of a possible trek through the nation's arenas. Frontman Fred Durst made the announcement via his official Twitter account, adding that he hoped the changes would result in "a better LIMP experience" for fans.

LIMP BIZKIT recently completed work on its new studio album, 'Gold Cobra', but has yet to announce a release date for the effort.