Nigeria's President Muhammadu Buhari is travelling to the UK on a "private visit", the presidency's Twitter account says.
No reason for the trip was given but Mr Buhari, who won re-election in February, has been beset by ill health since taking office in 2015.
The 76-year-old was on "medical leave" in the UK for three months in 2017.
Details of his medical condition were never made public.
STATE HOUSE PRESS RELEASE
PRESIDENT BUHARI PROCEEDS TO THE UNITED KINGDOM ON PRIVATE VISIT#Thread
Ghana News Headlines
For latest news in Ghana, visit Graphic Online news headlines page Ghana news page— Presidency Nigeria (@NGRPresident) April 25, 2019