Jose Mario Vaz and Nuno Gomes Nabiam will compete in second round to become the country's next president on May 18. Guinea-Bissau to hold presidential run-off Almost three-quarters of Guinea-Bissau's eligible voters participated in the first round of the election [AP] Guinea-Bissau will hold a second round in its presidential election after no candidate secured a majority in the first, according to the country's election commission. Jose Mario Vaz, Guinea-Bissau's former finance minister and a member of the African Party for the Independence of Guinea-Bissau and Cape Verde, will compete with Nuno Gomes Nabiam, an army-backed candidate, for the country's presidency on May 18. Vaz won 40.99 percent of total votes in the first round and Nabiam came second with 25.14 percent, according to election commission figures that were released on Wednesday. Al Jazeera's Catherine Soi, reporting from Guinea Bissau, said people were wary of a second round vote. "They worry about what might happen, and they are scared of what the army might do, even though the chief of staff of the army has said that the country's troops will respect the result," our correspondent said. Thirteen politicians were in the running for the position before the first round of voting on April 13. The presidential and parliamentary elections are meant to give the country a fresh start, after its independence from Portugal in 1974 resulted in decades of instability.