By Emily Chow and Liz Lee KUALA LUMPUR (Reuters) - Malaysian police said on Saturday they had arrested a North Korean man in connection with the murder of the estranged half-brother of North Korean leader Kim Jong Un, as a diplomatic spat over his body escalated. Kim Jong Nam died this week after being assaulted at Kuala Lumpur International Airport with what was thought to be a fast-acting poison. South Korean and U.S. officials have said he was assassinated by North Korean agents.



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