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US Secretary of State Rex Tillerson who is currently in Kenya has cancelled events scheduled for Saturday die to sudden ill health.
“The secretary is not feeling well after a long couple days working on major issues back home such as North Korea,” the state department said.
Officials accompanying Mr Tillerson, 65, on his five-nation tour of Africa did not specify his illness but it is understood not to be serious.
Mr Tillerson was in the Ethiopian capital of Addis Ababa when news of Donald Trump’s agreement to meet Mr Kim in unprecedented talks broke late on Thursday.
The decision is reported to have been taken without consultation with key advisers, including Mr Tillerson.