By Hani Mahmoud, reporting from Khan Younis in southern Gaza
Thirteen people have now been killed in the attack on the residential building in eastern Khan Younis and many more have been injured.
We managed to speak to one of the family members who survived the attack. He said the ground was shaking underneath their feet before a loud explosion took place and destroyed the building.
These earthquake bombs have been used by the Israeli forces before. The bombs penetrate the ground, shake the foundations of the building and destroy all of it.
Source: AlJazeera