(IsraelNN.com) An IDF investigation has found that Hamas fired mortars from the UNRWA school which was hit by an IDF bomb Tuesday.

After the terrorists fired mortar shells from the school in Jebaliya , the IDF retaliated, killing Hamas terrorists as well as civilian adults and children who were used as human shields.

At least 30 were killed by the IDF bombing.

Proof has also emerged that the school was being used to store weapons. Secondary explosions were witnessed following the primary explosion from IDF fire.

UNRWA is the United Nations' Relief Works Agency.