Why has there been political unrest in Mozambique?

Africa Daily - A podcast by BBC World Service

On the 11th of October, the citizens of Mozambique voted in their country’s municipal elections. The authorities later announced that the ruling Frelimo won 64 out of 65 municipalities. The main opposition Renamo, however, disputed the election results saying the process was rigged, a claim that has been denied by Frelimo. Two people have lost their lives since the unrest started. The violence has been condemned by the European Union and US embassy who’ve urged all parties involved to find a peaceful resolution. Hostilities between Frelimo and Renamo go back to the 1970s when Mozambique descended into a civil war that claimed an estimated one million lives. Presenter: Peter Musembi