The Egyptian military stated that four troops and 36 terrorists were killed in the past five days of fighting in the restive Sinai Peninsula.
Monday's statement said one officer was among the four killed army personnel. It further added that eight soldiers were wounded, including two officers.
The military also announced that it destroyed 400 hideouts, munition and weapons depots and dismantled 93 explosive devices during the operation.
It said that 345 suspected militants and fleeing criminals have been arrested.
Since Egypt launched the wide-scale operation more than a month ago, 20 troops have been killed.
Egypt has been battling extremist militants for years, but the insurgency gathered steam and grew deadlier after the 2013 ouster by the military, of president Mohammed Morsi whose one year in office proved divisive.
Source: News Agencies, Edited by website team