The blast struck on the Egyptian side of the divided city of Rafah on the Gaza border, the official said.
"An officer and two soldiers were killed and another soldier wounded when their armored vehicle hit a bomb in the Tawil al-Amir district," the security official told AFP.
ISIL terrorists said they carried out the attack. "We blew up an armored vehicle of the apostate army and everyone inside was killed," ISIL Sinai Province said on its Twitter account.
Formerly known as Ansar Beit al-Maqdis, the group has carried out repeated deadly attacks on the security forces in its peninsula stronghold.
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