Egyptian security forces have so far killed hundreds of terrorists and arrested thousands of suspects during the country's anti-terror war declared by Sisi, the army chief then, following Morsi's ouster in 2013.
He gave the order in November after a gun and bomb attack on a mosque killed more than 300 people.
It covers north and central Sinai, the Nile Delta and the Western Desert along the porous border with Libya.
Sunday's statement said that security forces also uncovered and destroyed a media centre with computers, wireless communication equipment, books and documents related to jihadi ideology.
Last Friday, police and army announced that they will be on high alert for the duration of Operation Sinai 2018.
Egypt denied this, and Israel declined the chance to comment. North Sinai has witnessed many terrorists attacks since the January 2011 revolution. It also claimed the downing of a Russian airliner in October 2015, killing all 224 people on board.
Naval units from a Mistral helicopter carrier have continued to comb the coast of Arish, the capital of North Sinai governorate, while police and coast guards intensified security measures and patrols, including in Egypt's southern desert and through mountainous paths along the southern and western borders, to "thwart any attempt to sneak through worldwide borders".
But the militants launched another brazen attack in December, firing a missile at a helicopter that was part of the entourage of Egypt's defense and interior ministers, who were in the provincial capital el-Arish on an unannounced visit.
Meanwhile, two militant groups that have carried out previous attacks on security forces, denounced the new operation in statements posted online.