Austrian security forces foiled an attempt to assassinate a son of North Korean leader Kim Jong-il during a European trip in November, Yonhap News reported on Sunday, but Austrian authorities denied any incident.The report of the plot against Kim Jong-nam came amid persistent rumors of internal political strife in the reclusive communist state and within the nation’s first family itself. Citing a source familiar with North Korean affairs, the South Korean news agency said the failed plot had been planned by North Koreans favoring other of Kim Jong-il’s sons as his eventual successor.Full Story