Guinea Bissau's President Jose Mario Vaz has dissolved the government because of a growing rift with the prime minister, a presidential decree announced late on Wednesday, Reuters reported. Tensions, fed by overlapping duties in GuineaBissau's semi-presidential system, have grown between the president and Domingos Simoes Pereira since civilian rule was restored to the unstable West African nation last year following a 2012 coup. Donors pledged more than 1 billion euros ($1.11 billion) in March to support the country after last June's elections.