Egypt's Muslim Brotherhood has called on President Mursi's supporters to take to the streets of Cairo on Tuesday.
Protests against Mursi's decision to assume sweeping powers in the country were already planned in the capital for the same day.
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An ejector seat manufacturer is to be prosecuted over the death of Red Arrows pilot Sean Cunningham at RAF Scampton in November 2011.
Police said the "active shooter", reportedly a lawyer, had since been shot by officers and they were not seeking any other suspects.