At least 16 people have been killed and more than 200 injured after explosions hit a school serving as a U.N. shelter for families escaping the ongoing violence.
It was a place that was supposed to be a safe zone for women and children, but images from the scene of the attack show pools of blood.
It's still unclear who is responsible. The Israeli military says it's investigating and suggests a Hamas rocket could be to blame, while Palestinians call the strike "brutal aggression" from Israel.
In an interview with CNN's Erin Burnett, Israel's Ambassador to the United States Ron Dermer tells her why Hamas is to blame for the attack on the U.N. shelter.