An Israeli official said that five Americans were among the dead. The other victims were French and Czech.
More than 300 people were killed in the attack at Al Rawdah mosque.
No group has claimed responsibility, but Egyptian forces are battling a stubborn Islamic State affiliate in the region.
No group has claimed responsibility, but officials said gunmen brandished an Islamic State flag.
No group immediately claimed responsibility for the attack.
Egypt is battling an Islamist insurgency concentrated in the Sinai peninsula.
“Apostasy, sorcery, claiming the ability to tell the future, and leading people to polytheism.”
Wherever you look in the chaos of Egypt today, the finger points at one man Sisi, and one institution the Egyptian army. It is he and it, not "foreign hands" which are at the epicenter of the country's instability.