Iranians begin voting for President

Iranians went to the polls Friday to choose a new leader. The election pits incumbent President Mahmoud Ahmadinejad against three main candidates.

More than 46 million people are eligible to cast their ballots at poll stations that could stay open until midnight in case of a high voter turnout.

More than 46 million people are eligible to cast their ballots at poll stations that could stay open until midnight in case of a high voter turnout.

Police have taken strict security measures at the stations to prevent a possible outbreak of violence.

According to Iran's election law, any candidate who gains 50 percent of the vote plus one will win. If no winner emerges in the first round, the top two candidates will contest in a run-off one week later.