Production has been halted on the hit Fox show '24' as Kiefer Sutherland undergoes elective surgery to deal with a ruptured cyst near one of his kidneys, PEOPLE reports. "We are temporarily suspending production of '24' while our friend and colleague Kiefer Sutherland undergoes a medical procedure," the network says in a statement. "We hope to resume production shortly and do not anticipate any disruption in the broadcast of this season's episodes."