Investigation of Operation "Dawn Breaking" reveals that the organization planned to carry out attacks across the border through the underground space, but according to information that reached Walla! their soldiers refused to enter it. This is in light of the severe damage to the Hamas tunnels - and their occupants - in operation "Guardian of the Walls".
The Islamic Jihad planned to implement an operation that included raids on Israeli territory during the last operation.
Therefore, from the beginning of "Operation Dawn Breaking" there was great IDF vigilance in the Southern Command and the intelligence community for the possibility that the would attack from tunnels.
This, in the end, was not needed. PIJ terrorists refused to execute this plan.