Col Tamer al-Refaei said an additional 34 suspects were arrested during the offensive, dubbed "Operation Sinai 2018", which started on Friday in the restive peninsula and other parts of the country, according to a statement posted on his official Facebook page.
A military spokesman said the operation would cover large parts of Sinai, but also parts of the Nile delta and the Western Desert, where other militants have waged attacks, some believed to be staged out of neighbouring Libya.
Egypt's armed forces Saturday continued what it describes as "intensive airstrikes against terrorist targets and gatherings" in Central and North Sinai.
Authorizing troops to use "all brute force" necessary to restore "security and stability" to the region within three months, suspicion for that attack fell on an affiliate of the Islamic State (IS) group in Sinai.
The Egyptian army also said that 66 terrorist points, arms depots, eleven vehicles and 31 unlicensed motor-bikes used by militants in their attacks were destroyed during the raids.
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A spokesman said: "A very cold westerly airstream will bring frequent snow showers to many western and central areas on Sunday ". Temperatures in the north will be 8C at their highest, with the south-west enjoying slightly higher temperatures of 12C.
The military also discovered and destroyed an explosives-making laboratory and a communications centre, as well as six cannabis and opium fields, he added.
The Sinai peninsula, where Egypt's most active militants are based, borders Israel and the Gaza Strip. Members of the armed forces are barred by law from expressing political opinions in Egypt. Konsowa said he had submitted his resignation to the army in 2014 and it was denied.
Islamist insurgents have been targeting security forces since 2013 when the army, then led by Sisi as army chief, ousted President Mohamed Mursi of the Muslim Brotherhood following mass protests against his rule.
In November 2017, at least 235 people were killed in a bomb and gun attack on a mosque in Bir al-Abed, a town in North Sinai province. As a result, the army carried out two massive military operations; In August 2011, the army launched "Eagle 1" against militants who claimed responsibility for bombing the Egypt-Israel gas pipeline in Arish in July 2011. Last year, militants attacked a Sufi mosque in the region, killing 311 worshipers.