Nearly two dozen people have been killed in violence that erupted following a disputed presidential election in Guinea last week, state television reported on Monday, as international envoys attempted to soothe tensions in the West African nation. Al Jazeera reports that 82 year-old President Alpha Conde won the hotly contested October 18 election according to official results announced on Saturday, setting the stage for a controversial third term, but his main opponent Cellou Dalein Diallo disputes the results. He claimed victory last week, citing data his supporters gathered at individual polling stations, leading to a week of clashes between his supporters and security forces across the nation.