He departed his hotel Millennium Tower New York accommodation Thursday morning for JFK International Airport for his journey the London.
"In addition to calling attention to this, the former Vice President says he is convinced Nigeria will also provide the world a good example in the way we treat our minority groups", Atiku's media team said in a statement published by the Vanguard.
"One thing is sure; the trip was to last between last Sunday and next Sunday/Monday".
Presidential spokesperson, Garba Shehu, said he can not confirm if the president was going to see his doctors in London.
Buhari met with President Donald Trump of the USA on Wednesday, September 20, on the side-line of the United Nations General Assembly.
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President Muhammadu Buhari has left NY for London after participating in the 72nd Session of the United Nations General Assembly.
"This afternoon in NY I joined a number of fellow African Heads of State at a Lunch hosted by President Donald J. Trump".
He also said the president pledged Nigeria's continued desire for enhanced bilateral ties with the Hashemite Kingdom of Jordan, adding that the king told Buhari that his National Security Adviser would soon be working out the final details of the Aqaba Process with his Nigerian counterpart.
Buhari left NY on Thursday where he attended the 72nd United Nations General Assembly meeting.
"President also pointed out that there were large sums of money that had been illegally siphoned out of the country and they were in the United States and talked about the efforts that we were making to repatriate those funds back to Nigeria, because they are funds that we really need in the context of our economic challenges".