Protest at Tahrir Square on Tuesday

Political parties, angered by President Mohamed Mursi's decision to grant himself sweeping powers, have called on their supporters to protest against the move on Tuesday in Cairo

“We are facing a historic moment in which we either complete our revolution or we abandon it to become prey to a group that has put its narrow party interests above national interest,” said the statement, issued by the liberal Dustour Party on its Facebook page late on Friday.

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