"As a result of the heroic combat operations by our armed forces...seven heroes of the armed forces were martyred," military spokesman Colonel Tamer Rifai said at a press conference aired today on state television.
"71 extremists have been killed and five arrested," he said.
Rifai added that 1,852 other suspects have been rounded up in the operation that began on February 9, following an ultimatum by the President Abdel Fattah al-Sisi to end the deadly insurgency.
Sisi ordered his security commanders to put an end to the attacks following a massacre at a northern Sinai mosque in November that killed more than 300 worshippers.
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IS is believed to have carried out the attack on the mosque, frequented by Sufi Muslims, but it has not claimed responsibility.
The group's Egyptian branch has used the north of the Sinai Peninsula, which borders Israel, as a staging ground for its attacks.
Egypt is holding a presidential election next month, which Sisi is expected to easily win.