President Muhammadu Buhari and former President Olusegun Obasanjo met briefly on Sunday, a few days after Obasanjo asked the President not to re-contest in 2019.
The two leaders met at the opening session of the 30th African Union Summit in Addis Ababa, Ethiopia.
On sighting Buhari at the venue, Obasanjo who ruled Nigeria as a democratically elected President between 1999 and 2007 approached the President and shook hands with him.
The two leaders exchanged pleasantries and engaged each other in a short discussion that lasted about two minutes.
Obasanjo had in a widely publicised press statement last week gave a damning verdict on the administration led by Buhari.