Ten Egyptian soldiers were killed and 35 wounded in a car bomb near the North Sinai city of El-Arish, a security official has said.
The soldiers were travelling in a convoy ahead of the attack.
The attack is one of the deadliest in the Sinai Peninsula since al Qaeda-inspired militants began stepping up assaults following the army's ousting of Islamist President Mohamed Morsi in July.
More top news
Cloudy skies for many this Bank Holiday Sunday.
The brother of British holidaymaker Steven Cook who vanished in Crete 10 years ago has his family are "sure he's alive".
Neurologist and Author Dr. Oliver Sacks CBE who wrote popular case histories like “The Man Who Mistook His Wife for a Hat” has died aged 82.