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Voting in Liberia's presidential election has started with small lines forming outside polling stations despite the opposition's call for a boycott.
Voters are choosing whether to give incumbent Ellen Johnson Sirleaf a second, five-year term.
Her opponent is former United Nations diplomat Winston Tubman, but he called on supporters to boycott the vote, alleging that the process is rigged in the ruling party's favour.
Mr Tubman's allegations of fraud have been rejected by all the major international observation missions, and his call for a boycott was sharply criticised by both the United States and his former employer, the United Nations.
The boycott will not stop Ms Sirleaf winning, but it could undermine her victory since she would be running unopposed.
