Nigeria’s President Muhammadu Buhari has asked the parliament to extend his medical leave in the UK, amid concerns that his health may be worse than officials are publicly saying.
The 74-year-old leader, who has been out of the country for two weeks, was expected to return to Abuja on Sunday.
An official statement said he had been advised by doctors to await the results of a series of tests.
However, it did not say how much extra time would be needed.
There was also no mention of what the medical checks were for.
The main opposition People’s Democratic Party (PDP) has called for more transparency about the president’s condition.
Analysts say that Mr Buhari’s extended leave could further erode confidence in his administration which is already under pressure due to a weak economy and the conflict with Boko Haram Islamist militants in the north-east of the country.
The country is currently suffering from its worst economic crisis in years, following a sharp fall in the price of oil, its major export.
Businesses and investors complain that the government’s handling of the currency exchange rate has made a bad situation even worse, and there have been demonstrations against the lack of jobs and high inflation.
Some Nigerians are particularly anxious about the president’s health after one of his predecessors, Umaru Yar’Adua, died in 2010 after several months of medical treatment in Saudi Arabia.
During that time, very little information was made public about his condition, leading to a political limbo in the country.
It is the second time in less than a year that Mr Buhari has sought medical assistance overseas. Last June, he spent nearly two weeks, again in London, for treatment for an ear infection.
In Abuja, where protests against government policies have been taking place, demonstrators used the occasion to voice their concerns.
One woman complained: “We are completely in the dark.”
And a lawyer added: “Anybody can fall sick but when a president falls sick, it should not be a confidential matter.”
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