0330 GMT February 19, 2019
The Sinai has recently witnessed some of the heaviest fighting between security forces and terrorists since the army toppled President Mohamed Morsi of the Muslim Brotherhood in 2013, Reuters reported.
Security sources said on Sunday troops killed the 63 in villages between the towns of Sheikh Zuweid and Rafah.
The army found four terrorist hideouts and attacked them with Apache helicopters and ground troops. It also attacked vehicles belonging to the terrorists, the security sources added.
ISIL's Egypt affiliate, recently renamed Sinai Province, has killed hundreds of soldiers and police since Morsi's removal.
Though the vast peninsula has long been a security headache for Egypt and its neighbors, the removal of Morsi brought new violence that has grown into an insurgency that has spread out of the region.
Last week, a car bomb in Cairo killed Egypt's top prosecutor, the highest-profile official to die since the insurgency began.
Egyptian government officials have accused Morsi's Muslim Brotherhood of links to Sinai attacks. The Brotherhood says it is a peaceful movement that wants to reverse what it calls a military coup through street protests.
Egypt's Interior Ministry said on Sunday it had arrested 12 Brotherhood.
Also on Sunday, the prosecutors referred to trial of 22 people charged with planting bombs near targets including the high court and cabinet buildings, state news agency MENA reported.
President Abdel Fattah al-Sisi has also expressed concern about terrorists based in neighboring Libya, where Egypt has launched airstrikes on ISIL targets.