President Muhammadu Buhari was absent from Friday prayers at the mosque in the grounds of Aso Rock, state house.
This is unusual given that he is in the capital, Abuja, the BBC’s Mohammed Kabir reports.
Earlier this week he missed his second cabinet meeting in a row amid speculation about the state of his health.
Last month, he returned from London after spending seven weeks away on medical leave where he was treated for an undisclosed condition.
His office sent a statement yesterday to explain his absence from cabinet saying it was “a last minute decision”.
It added that Mr Buhari was still carrying out his presidential duties:
“Despite his lack of visibility, Nigerians should rest assured that President Buhari has not abdicated his role as Commander-in-Chief of Nigeria.
He receives daily briefings on the activities of government, and confers regularly with his Vice-President, Professor Yemi Osinbajo.
His private residence, in which he has been spending the majority of his time recently, also has a fully equipped office.”