Four-year-old Daniel Turgerman was killed in the Sdot Negev Regional Council after a mortar fired from Gaza exploded near a kindergarten this morning.
The US ambassador to Israel, Dan Shapiro, condemned the attack and recriminated Hamas for its indiscriminate use of rockets to harm Israeli civilians.
"I condemn in the strongest terms this outrageous terrorist attack and offer condolences to the boy's family. Israel has the right and obligation to defend itself, which the United States supports," wrote Shapiro on his Facebook page.
Prime Minister Netanyahu went even further and promised the Israeli people that Hamas would pay a "heavy price" for its actions.
A rocket also hit a synagogue in Ashdod today, injuring two people and causing material damage.
Since the indirect talks collapsed in Egypt on Tuesday, more than 447 rockets have been launched against Israel. More than 113 projectiles were launched towards Israel just today. On average, since Hamas broke the latest ceasefire, there has been a rocket fired at Israel from Gaza every 10 minutes.