Nigerian and world leaders react to the death of Nigerian President Umaru Yar'Adua.
Mr Yar'Adua died aged 58 on Wednesday following a long illness.
NIGERIA'S NEW PRESIDENT GOODLUCK JONATHAN
Nigeria has lost the jewel on its crown and even the heavens mourn with our nation tonight. We must - in the midst of such great adversity - continue to gain our collective efforts towards upholding the values which our departed leader represented.
NIGERIAN FORMER MILITARY RULER IBRAHIM BABANGIDA
He was great in death and graceful in life. He represented our daily struggle in life's bramble forest.
NIGERIAN NOBEL PRIZE LITERATURE LAUREATE WOLE SOYINKA
This man was not allowed to be even ill in dignity.
He's been kept in a vegetative state while the country was lied to repeatedly and in this conspiracy his own family was involved to one's disgust. The whole thing was spun on politics and who's going to be the next party candidate for next year.
THE MOVEMENT FOR THE EMANCIPATION OF THE NIGER DELTA (MEND)
Mend considers the late president a genuine peacemaker whose initiatives, humility and respect began to bring confidence to the peace process. His death may leave a vacuum that may not be filled.
US PRESIDENT BARACK OBAMA
We remember and honour President Yar'Adua's profound personal decency and integrity, his deep commitment to public service, and his passionate belief in the vast potential and bright future of Nigeria's 150 million people.
President Yar'Adua worked to promote peace and stability in Africa through his support of Nigerian peacekeeping efforts as well as his strong criticism of undemocratic actions in the region.
He was committed to creating lasting peace and prosperity within Nigeria's own borders, and continuing that work will be an important part of honouring his legacy.
TANZANIAN PRESIDENT JAKAYA KIKWETE
It's very sad, it's tragic, he is so young, he died too early. We join the people of Nigeria in mourning his death. Nigeria is strong enough, they will weather the storm.
ZIMBABWEAN PRESIDENT ROBERT MUGABE
It's a very, very sorry event and I'm terribly sorry about it. We didn't think that it would come to this. We thought he was recovering, actually. But we are very sorry.
ZIMBABWEAN PRIME MINISTER MORGAN TSVANGIRAI
It's a great loss for Nigeria at this time, he has been ill for some time and it's unfortunate that this is what has happened. I hope it provides the stability for the country to move forward.
KENYAN PRESIDENT MWAI KIBAKI
Although Yar'Adua has sadly left us, he has bequeathed upon the people of Nigeria and Africa at large a rich legacy of integrity.
SOUTH AFRICAN PRESIDENT JACOB ZUMA
It is South Africa's wish that the leadership of Nigeria will do everything in its power to ensure that this African country forges ahead with the vision of President Yar'Adua to make Africa and the world a better place to live in.
UN SECRETARY GENERAL BAN KI-MOON
He will be remembered, among other things, for his efforts to bring peace and stability to the Niger Delta region and for his commitment to democratic governance and electoral reforms.