Unidentified assailants shot and killed a policeman and injured two others in the Nile Delta city of Sharqiya on Tuesday, state news agency MENA reported.
The three were in a security patrol on the highway to Cairo. They approached a suspect car on the road side and were shot by the people inside. The assailants fled the scene.
It was not clear whether it was a terrorist or criminal attack.
Attacks on security forces have spiked dramatically since the ouster of Islamist president Mohamed Morsi last year.
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