A former government minister and economist has been named the new prime minister of Guinea by President Alpha Conde, according to a decree read out on state media.Ibrahima Kassory Fofana, 64, was previously responsible for investments and public-private partnerships in the outgoing government, which resigned last week."The president of the republic, professor Alpha Conde, signed on Monday night a decree appointing Mr Ibrahima Kassory Fofana (64 years) as prime minister, head of government", the decree said.He must "propose a new government as soon as possible" in the West African state, it added.Fofana replaces Mamady Youla, who resigned on May 17, two months after the president promised to carry out a "great ministerial reshuffle" following a series of strikes and demonstrations against the official outcome of local elections in February.* Sign up to News24's top Africa news in your inbox: SUBSCRIBE TO THE HELLO AFRICA NEWSLETTERFOLLOW News24 Africa on Twitter and FacebookThe vote was the first of its kind since a military dictatorship ended a decade ago. Opposition leaders say the process was unfair and fraudulent.At least a dozen people were killed in post-election protest violence.Last week, opposition parties suspended the street protests, saying the international community had offered to mediate.Fofana, a former political opponent of Conde, has developed a closer relationship with the president in recent years.An economist by training, the new prime minister was a senior government official in the 70s and 80s, including in the area of international cooperation. He also served as the budget and finance minister in the 90s.After a period of voluntary exile, he returned to Guinea and stood as a presidential candidate in 2010 but won only 0.66 percent of the vote.