Security forces targeted in Egypt
7 October 2013 Last updated at 11:36 BST
There have been several attacks against strategic targets in Egypt.
Gunmen killed five Egyptian soldiers who were sitting in a car at a checkpoint north of the city of Ismailiya.
A large car bomb struck the offices of the security forces in southern Sinai, while a rocket-propelled grenade is reported to have hit a communications satellite disc in a Cairo suburb.
Quentin Sommerville reports from Cairo.