Mogadishu - Somalia's groundbreaking presidential election moved into a second round on Wednesday as the number of candidates dropped from 21 to three, while a security lockdown closed the capital's international airport and cleared major streets.Incumbent President Hassan Sheikh Mohamud held a slight lead over former prime minister Mohamed Abdullahi Farmajo, 88 votes to 72. Former president Sharif Sheikh Ahmed was third with 49, and Prime Minister Omar Abdirashid Sharmarke was fourth with 37.But Sharmarke then dropped out of the race, saying, "I know where this is heading to."With at least one of the remaining candidates having dual citizenship, Somalia could end up with a president who also holds a US passport, Farmajo.This Horn of Africa nation is trying to put together its first fully functioning central government in a quarter-century. Years of warlord-led conflict and al-Shabaab extremist attacks, along with famine, have left this country of about 12 million people largely shattered.Members of the upper and lower houses of the legislature dropped their ballots into clear boxes at the heavily guarded election venue, a former air force base in the capital, Mogadishu.Fears al-Shabaab attacks limited the election to the lawmakers instead of the population at large. The voting was being streamed online .Across Mogadishu, Somalis gathered around TV screens at cafes and homes, eagerly watching the vote."I hope they will not choose bribes over the interest of the people." said Ahmed Hassan, a 26-year-old university student, who sat with dozens of men in front of a large television screen. "We need an honest leader who can help us move forward."Alinur Muhummed, 36, a laborer, criticised the legislators. "They don't have any sense of patriotism or nationalism. I don't believe they will elect a president ... according to his national plan but rather the bribes he paid them ... It'll take time for Somalia to stand on its feet again."Somalia's instability landed it among the seven Muslim-majority countries affected by President Donald Trump's executive order on immigration, even though its government has been an increasingly important partner for the US military on counter-terrorism efforts, including drone strikes against al-Shabaab leaders.In a sign of the dangers that remain in Mogadishu, two mortar rounds fired by suspected extremists late on Tuesday hit near the election venue.While the international community has pushed Somalia to hold this election as a symbol of strength, including the US pouring in hundreds of millions of dollars in recent years for political and economic recovery, the vote has been marred by reports of widespread corruption.The legislators voting - 275 members of the lower legislative house and 54 senators - were selected by the country's powerful, intricate network of clans. Weeks ago, a joint statement by the United Nations, the US, European Union and others warned of "egregious cases of abuse of the electoral process."Examples included violence, intimidation and men taking seats that had been reserved for female candidates, the joint statement said.With reports of votes being sold for up to $30 000 apiece, "This is probably the most expensive election, per vote, in history," the Mogadishu-based anti-corruption group Marqaati said in a report released on Tuesday.The prime minister, Sharmarke, has accused regional countries of interfering in the electoral process by pushing for certain candidates. "Those neighboring countries should respect our sovereignty and stop meddling in our affairs," he said, without naming the states. Various Muslim-majority countries seek a friendly Somali government, including Turkey, which has invested heavily in the country. The United Arab Emirates and Qatar are backing different candidates.