Former President John Dramani Mahama has joined the world to mourn the late former Secretary General of the United Nations (UN) Kofi Annan.

According to Mr Mahama, Mr Annan “lived and worked for global peace, security and sustainable development in very challenging times”.

He added that the former world leader was “a proud son of Ghana and Africa”.

An outpouring of heartfelt tributes has since flooded social media in the wake of the passing of former UN Secretary-General Kofi Annan.

World leaders including President Nana Akufo-Addo, President Rashtrapati Bhavan of India, South African President Cyril Ramaphosa, UN Secretary-General António Guterres, Amnesty Secretary- General Kumi Naidoo, Ireland’s Deputy Prime Minister Simon Coveney among others have taken to their Twitter handles to share tributes.

Mr Annan died at age 80 in Berne, Switzerland, on Saturday, 18 August 2018 after a short illness.

Kofi Annan served as the seventh Secretary-General of the United Nations from January 1997 to December 2006.

He was the founder and chairman of the Kofi Annan Foundation, as well as chairman of The Elders, an international organization founded by Nelson Mandela.

He was survived by a wife and three children.