An Egyptian police officer has reportedly been shot dead in clashes on the outskirts of Cairo.
The trouble erupted as security forces tried to reassert control over Kerdasa, a part of the Egyptian capital where 11 policemen were killed in a militant attack last month.
It is the second police operation this week in an Islamist-dominated area where hostility to authorities has grown since the army deposed President Mursi in July.
Meanwhile, police say they have disarmed two explosive devices found on the metro at Helmeyet el-Zaytoun station, in the north east of Cairo.
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