Geneva: Leaders from around the world outpoured condolences after former United Nations Secretary General and Nobel Peace Prize laureate Kofi Annan died on Saturday.
Here are some of the tributes:
Describing his predecessor as "a guiding force for good", Current United Nations chief Guterres expressed grief over his death.
"In many ways, Kofi Annan was the United Nations. He rose through the ranks to lead the organisation into the new millennium with matchless dignity and determination. Like so many, I was proud to call Kofi Annan a good friend and mentor," he said.
The UN high commissioner for human rights Zeid Ra'ad Al Hussein said: "Kofi was humanity's best example, the epitome, of human decency and grace. In a world now filled with leaders who are anything but that, our loss, the world's loss becomes even more painful. He was a friend to thousands and a leader of millions. There are some human beings who will seem irreplaceable to us, rare human beings. Kofi Annan is high among them. Goodbye my dear friend... goodbye Kofi."
Prime Minister Narendra Modi and President Ram Nath Kovind took to twitter to condole the demise of Kofi Annan. Congress leader Shashi Tharoor also tweeted his condolences.
Ghanaian President Nana Akufo-Addo declared a week of mourning and said that the national flag will fly at half-mast at home and in the country's diplomatic missions around the world in honour of "one of our greatest compatriots".
"He brought considerable renown to our country by this position and through his conduct and comportment in the global arena," the president said in a statement.
"He was an ardent believer in the capacity of the Ghanaian to chart his or her own course onto the path of progress and prosperity."
South Africa's ruling African National Congress (ANC) said Annan was "an eminent and distinguished son of Africa".
"Annan was a great friend of the people of South Africa who played an immeasurable role in shaping the global agenda in favour of the people of the developing south," the ANC said in a statement.
"Amongst his many passions was silencing the guns on the African continent."
British Prime Minister Theresa May said her "thoughts and condolences are with his family".
"A great leader and reformer of the UN, he made a huge contribution to making the world he has left a better place than the one he was born into," she said on Twitter.
Spain's Prime Minister Pedro Sanchez said that "today we lose a great humanist".
"Annan... has left us but his legacy remains to keep working for peace, security and to strengthen the defence of human rights," Sanchez tweeted.
NATO chief Jens Stoltenberg said: "His warmth should never be mistaken for weakness. Annan showed that one can be a great humanitarian and a strong leader at the same time," Stoltenberg wrote on Twitter.
"The UN and the world have lost one of their giants."
EU Commissioner for International Cooperation and Development Neven Mimica said he was "profoundly saddened" by Annan's death.
"He was such a great source of inspiration for all of us and will be greatly missed!" he tweeted.