According to a twitter post from the Presidency handle, the President will  be in Lagos to inaugurate the ECOWAS border post at Seme-krake in Lagos.

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He will be accompanied by his counterpart from Benin Republic, President Patrice Talon.

Update: Buhari Arrives Lagos

President Muhammadu Buhari arrived Lagos at 10:45AM.

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He will inspect a guard of honour mounted by the Nigerian Army, Navy and Air Force, before proceeding to the Seme Border.