Medical sources say Malawian President Bingu wa Mutharika has died after suffering a heart attack, but there has been no official announcement of his death.
Malawi's President Bingu wa Mutharika standing with United Nations Secretary General Ban Ki-moon, right, as they pose with various other heads of states members of the African Union during a summit meeting in Addis Ababa, Ethiopia, January 30, 2011. (AP
President Bingu Wa Mutharika and first lady Callista Mutharika arrive at Incheon Airport, South Korea, November 9, 2010. (AP Photo)
Indian Prime Minister Manmohan Singh, left, shakes hands with President of Malawi Bingu wa Mutharika, right, before a ceremonial reception at the Rashtrapati Bhawan, or Presidential Palace, in New Delhi, India, November 3, 2010. (AP)
President Bingu wa Mutharika and his Bride Callista walk under a military sword salute by officers of the Malawian defense forces after their wedding ceremony at Civo stadium in Lilongwe, April 17, 2010. (AFP Photo)