Security forces have killed nine militants in the Sinai Peninsula and also destroyed 15 vehicles transporting weapons into Egypt across its western border, the military said in statements yesterday.
The "extremists" were killed in two separate incidents in the middle Sinai, but the military did not say when they took place.
Egypt's military is battling a local affiliate of IS which has waged a deadly insurgency in the northern Sinai that has killed hundreds of members of the security forces.
Since December, IS has also targeted Christians in other parts of the country, including in Cairo, killing dozens.
The jihadists have threatened to carry out further attacks on Christians, who make up about 10 percent of Egypt's 90 million people.