South Korea has confirmed that North Korea's leader Kim Jong-un's half-brother Kim Jong-nam has been killed in Malaysia. He died after an apparent poison attack in the airport in Kuala Lumpur, on Monday. South Korea's spy agency suspects two female North Korean agents assassinated the estranged half-brother of North Korean leader. <br/><br/>U.S. Government sources also confirmed that North Korean assassins killed Kim Jong Nam. Kim Jong Nam had been living in the Chinese territory of Macau, under Beijing's protection,The Chief Police officer of Royal Malaysian police, Datuk Sri Abu Samad, has said the cause of Kim's death was not yet known, and investigations are still in progress.