Leader of the pan-Yoruba socio-cultural group, Afenifere, Pa Ayo Adebanjo, has stated that President Muhammadu Buhari has by his actions shown that he is the President of Katsina state, not of Nigeria, adding that he totally agrees with the content of Obasanjo's letter to the President.
They met briefly just before the opening ceremony of the session, where they exchanged pleasantries and warm embrace.
This comes five days after the former president in an 18-paged letter called for Buhari's retirement in 2019, saying the president should not "over-tax the patience and tolerance of Nigerians for him".
While addressing African leaders at the 30th AU Summit, President Buhari condemned in strong terms terrorism and terrorist activities in Africa and around the world.
It was also gathered that 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.
But on Sunday, it was banters galore by the two men who spent about two minutes together and were joined by a former Military Head of State, General Abdulsalami Abubakar.
Obasanjo had in a widely publicised press statement last week gave a damning verdict on the administration led by Buhari.
Drawing the attention of his colleagues to the "corrosive role that tax havens and secret jurisdictions play in concealing ill-gotten assets", President Buhari said the continental body "must do more to stop the continuous assault on our economic and financial resources by multinationals in collusion with some of our citizens".
The elder statesman, therefore, advised President Buhari to step down from the presidential horse in 2019, while also calling for a third force or newfangled coalition that should drive the change to draw the curtain on Buhari's presidency.