11 African Presidents Who Died In Office Under Mysterious Circumstances

9. Joao Barnado Viera (69) – Guinea-Bissau

João Bernardo “Nino” Vieira was the President of Guinea-Bissau from 1980 to 1984, for the second time from 1984 to 1999, and for the third time from 2005 to 2009.

He died in a bomb blast attack that was said to have been a retaliatory attack by soldiers.