
The bomb was detonated remotely when the victims' armored vehicle passed by during a security operation, the sources said.
Passerby killed in Cairo bombing
There was no immediate claim of responsibility, but an Islamist insurgency in the Sinai has gained pace since the military toppled President Mohamed Mursi of the Muslim Brotherhood in 2013 following mass protests against him.
Bomb kills two police in Egypt's Sinai: ministry
The militant group staging the insurgency pledged allegiance to Islamic State in 2014 and adopted the name Sinai Province. It is blamed for killing hundreds of Egyptian soldiers and police since then.
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