Tom Morello has cancelled his scheduled performance at this year’s Tons of Rock festival, organizers announced. The cancellation is due to unforeseen family circumstances, according to the festival’s statement. No further details regarding the nature of the family matter were provided. Morello was slated to be a headlining act at the Norwegian rock festival. This marks another headliner withdrawal for the event, though previous cancellations were not detailed. Festival organizers have not yet announced whether a replacement act will be sought.