Protest camp in Cairo, Egypt
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Egypt's hunger strike protest camp

19 December 2012 Last updated at 03:11 GMT

There have been further street protests in Egypt, with demonstrators marching on the presidential palace to voice their opposition to a contentious Islamist-backed draft constitution.

Egypt's Justice Ministry has ordered a probe into allegations of widespread voting irregularities during Saturday's first round of a referendum on the document.

Some opponents have set up a makeshift protest camp in Cairo, saying they will go without food until the president steps down.

James Kelly reports.