The armed forces said the strikes in North Sinai also destroyed four vehicles as it targeted a "terrorist stronghold" of the local Islamic State affiliate, formerly known as Ansar Beit al-Maqdis.
In a separate development, Egypt's Interior Ministry said it killed the three other militants, belonging to a shadowy group calling itself the Hasm Movement, in an apartment raid in Alexandria. The ministry added that they were killed in an exchange of fire.
Insurgent attacks have dramatically increased in Egypt since the military ouster of elected President Mohammed Morsi, ending the Islamist leader's divisive, one-year rule. The violence has been concentrated in the northern Sinai Peninsula, where Islamic State-linked militants are battling the army.
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