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Egypt unrest: Muslim Brotherhood 'fired on police'

14 August 2013 Last updated at 19:10 BST

A TV station, which backs the government in Egypt, has aired infrared footage which the authorities say shows Muslim Brotherhood gunmen firing on police.

The claim follows the deaths of scores of protesters in Cairo, as security forces stormed the camps of Muslim Brotherhood supporters.

A state of emergency has been declared in Egypt and a curfew has begun.

James Robbins reports

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