The roads were sealed off and then reopened 12 days ago when a similar terror alert existed. The head of IDF Southern Command, Maj. Gen. Tal Rousso, later admitted that the decision to reopen the roads was a mistake.
The terrorists appear to have been able to surprise the IDF by enlisting the cooperation of Egyptian soldiers -- either by force or through bribery -- a matter that some suspect is purposely being covered up to avoid embarrassing Egypt. Reports said that the IDF was expecting them to infiltrate at night, and at points removed from the Egyptian positions. Instead they attacked in broad daylight, from the positions themselves or right next to them.
Brigadier-General (Res.) Tzvika Fogel seemed to be hinting this on IDF Radio Channel Tuesday morning: "How could anyone expect an attack like this one in broad daylight right under the nose of an Egyptian guardpost." Egyptian soldiers are supposedly cooperating with Israel to keep the peace.
The terrorist group behind the current infiltration attempt is the Islamic Jihad. The terrorists have left Gaza along the U-shaped road from Gaza to Sinai and after regrouping are expected to try and enter Israel in order to shed Jewish blood, and possibly attempt an abduction.