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
Sadiq Khan has weighed in on the debate over the burkini being banned on some French beaches saying women should not be told what to wear.
The USA women's football team goalkeeper Hope Solo has received a six-month suspension for comments made.
The mobile messaging service Whatsapp is going to start sharing users' phone numbers with Facebook, to ensure "better friend suggestions".