A military airport in North Sinai was targeted by a rocket on Tuesday during a visit of Egypt's interior and defense ministers to al-Arish.
Five extremists were killed and 11 were arrested in raids targeting terrorist hideouts in Qaliubiya, Alexandria and al-Wadi al-Gadid.
The Church of St. Peter and St. Paul suffered an ISIS suicide bombing attack last year that killed 29 worshippers.
The militants were training to carry out terror attacks, according to the interior ministry, which also announced the arrest of six other gunmen.
The procedures will target those who are using non-traditional methods to smuggle funds to terror groups, experts tell Al-Mashareq.
St. George's Church, which was attacked on Palm Sunday by an ISIS suicide bomber, held its first mass after it was restored on Sunday.
ISIS has not yet claimed the Friday massacre, which has been denounced by all other extremist groups in Egypt and even its own supporters.
The defendants are accused of belonging to ISIS's affiliate in Sinai and orchestrating devastating terror attacks in 2014 and 2015.
A new study seeks to define the challenges countries are facing as a result of the mass flight of foreign fighters from Iraq and Syria.
The attack on a North Sinai mosque, which killed 305 people, will not go unpunished, Egyptian authorities vowed.