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Ahmed Kattan, Saudi Arabia's ambassador to Egypt, is guided to a waiting car after his arrival in Cairo, Egypt, Saturday, May 5, 2012. Saudi Arabia's ambassador has returned to Cairo a week after he was recalled following a wave of protests against the detention of an Egyptian lawyer, the embassy said Saturday. (AP Photo/Ahmed Hammad)

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.