Egyptian opposition supporters shout slogans during a demonstration against President Mohamed Morsi and the Muslim Brotherhood in Cairo's landmark Liberation Square on June 29, 2013.
Several people, including one US citizen, have been killed in the ongoing violent clashes between supporters and opponents of President Mohammed Morsi across Egypt.
The casualties come as both pro-and anti-Morsi demonstrators staged mass rallies across the North African country on Friday evening.
Local security officials say the American was stabbed to death in Egypt's second city of Alexandria.
The United States is warning its citizens against travels to Egypt and has also asked its non-emergency diplomatic staff to leave the volatile country.
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