Polling stations opened across Egypt on Saturday for a presidential election run-off contested by an Islamist and Hosny Mubarak's last prime minister, dpa reported.
Some 50 million people are eligible to vote in the two-day poll to pick a successor to Mubarak, who was deposed in a popular revolt last year.
Neither Mohammed Morsi of the Muslim Brotherhood nor Ahmed Shafiq, a former air force general, managed to secure an outright majority in the first round lat month.
Morsi got 24.8 per cent and Shafiq got 23.7 per cent.
Their win in the first round triggered angry protests, mainly from secularists and young people, who led the uprising against Mubarak, hoping for a transition to democracy.
Opponents of Shafiq see him as a symbol of the Mubarak regime.
Critics of Morsi, an engineering professor, worry that his powerful group wants to establish a religious state in Egypt
The more than 13,000 polling stations, spread across the country's 27 provinces, were due to stay open until 8 pm.
State employees are given the two days off work to vote. The government has announced reduced fares on public transport on the days of the vote.
Official results are due to be announced on June 21.