"According to Egyptian security officer, 14 police officers were killed during a firefight with insurgents in the South-West of Cairo", the statement reads.
The exchange of gunfire took place on Friday in the al-Wahat al-Bahriya district in the Giza governorate, about 135 kilometers, from the Egyptian capital.
It was not immediately clear if any militants were killed or injured during the incident.
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Clashes occurred when eight militants opened fire at a security force that was heading to arrest them.
However there was no immediate claim of responsibility.
The fighters also used explosive devices in the attack, the sources said, adding that 16 officers died in the shoot-out and the number was expected to rise.
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The small extremist group Hasm claimed the attack, saying in a statement that 28 members of the security forces were killed, with 32 injured.
Egypt has been under a state of emergency since April after suicide bombers struck two churches north of Cairo, killing scores of Christians.
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