Nigeria, July 14 -- World leaders have expressed their condolences following the death of former Nigerian President Muhammadu Buhari, who passed away in London at the age of 82.

In a statement on Thursday, the Chairperson of the African Union Commission (AUC), Mahmoud Youssouf, described the former president as a Pan-Africanist and an advocate for regional integration.

Mr Youssouf offered his heartfelt condolences to the government, while stating that Mr Buhari was a "principled and resolute leader who served Nigeria with honour and conviction."

"He was a steadfast supporter of multilateral cooperation and a tireless champion of peace and stability across Africa," he said.

Similarly, Ethiopian Prime Minister Abiy Ahmed extended condol...