 Jane Araf, NPR News, Beirut. Israel says it tried to kill the leader of the military wing of Hamas this weekend. The attack took place in an Israeli-declared humanitarian zone in southern Gaza. At least 90 Palestinians were killed in the attack, and almost 300 others were injured. That's according to local health officials. Israel's prime minister says it's not clear if the leader, Mohammad Daif, was killed in that strike. You're listening to NPR News.