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An Egyptian supporter of Hazem Abu Ismail, who was barred from the presidential race because his mother held American citizenship, holds a copy of the Quran, the Muslim holy book, during a demonstration at Tahrir Square, the focal point of Egyptian uprising, in Cairo, Egypt, Friday April 20, 2012. Tens of thousands of protesters packed Cairo's downtown Tahrir Square on Friday in the biggest demonstration in months against the ruling military, aimed at stepping up pressure on the generals to hand over power to civilians and bar ex-regime members from running in upcoming presidential elections. (AP Photo/Amr Nabil)

Egypt imposes curfew, lockdown

Egypt's military has imposed a new curfew after 300 people were detained following deadly clashes with anti-army protesters, amid spiraling tension ahead of a presidential poll.