From Arutz Sheva:

An Egyptian source has revealed that if after launching a brutal attack in Sinai the Islamic State (ISIS) terror group approaches Gaza, President Abdel Fattah al-Sisi may “invite” the IDF to strike it.

The source, who is “familiar with Egypt’s decision-making process,” told Haaretz on Thursday that Sisi may give the green light given that Gaza falls under Israel’s responsibility.