32 Egyptians, most of whom were soldiers, were killed in a series of attacks by Islamist militants in the north of Egypt's Sinai peninsula and the Suez.
The coordinated attacks were mainly in and around the provincial capital of the Sinai, El-Arish.
The Islamic State affiliated group Sinai Province fired rockets at police offices, a military base and a military hotel in El-Arish.
A car bomb was detonated at the military base and several checkpoints were attacked.
The attack in the Suez was carried out with a roadside bomb.
More than 50 people were wounded in the extensive attacks.
Egyptian President Abdel Fattah al-Sisi has returned from an African Union Summit in the capital Addis Ababa in Ethiopia.
The four separate attacks on security forces in North Sinai were the bloodiest in years.
These are the first significant assaults in the region since the most feared Sinai militant group swore allegiance to IS in back in November of 2014.??
These attacks will further weaken the attraction of tourists to Egypt and it's already frail economy.
It has now been four years since the overthrow of Hosni Mubarak, and many people fear their situation is less now than it was under Mubarak's rule.
President Sisi wishes to project stability for Egypt amidst cries of shaming the Muslim Brotherhood.
Earlier this week, the day after the fourth anniversary of the uprising in Egypt that ousted the former president Hosni Mubarak, his two sons were released from jail.
Their release followed deadly clashes between police and anti-government protesters commemorating the uprising.
Alaa and Gamal Mubarak, along with their father, are pending retrial for embezzlement.
Middle East Correspondent