Middle East Tensions Supported by The United Nations says food being distributed by a new Israeli-backed system is “less than a drop in the ocean.” By Isabel KershnerRawan Sheikh Ahmad and Sanjana Varghese Isabel Kershner reported from Jerusalem, and Rawan Sheikh Ahmad from Haifa, Israel. A new Israeli-backed aid group opened a third hub in Gaza on Thursday to try to get more food to a desperate population. But more chaotic scenes unfolded during the opening, similar to the launch of the first center this week. The United Nations and other aid organizations have declined to cooperate with the new aid group, the Gaza Humanitarian Foundation, describing it as a militarized distribution operation that violates humanitarian principles. On Thursday, crowds of hungry Palestinians scrambled for handouts and dodged stun grenades that were fired outside the new aid hub to disperse crowds, according to videos verified by The New York Times. Some, carrying their aid bundles, climbed over earthen walls surrounding the site in Al-Bureij, in central Gaza. It was unclear who had fired the stun grenades, but the Israeli military denied any involvement. A day earlier, a large crowd of desperate Palestinians broke into a warehouse run by the U.N.’s World Food Program in Gaza in search of food and flour. Program officials said initial reports indicated that two people had been killed. On Tuesday, at the chaotic launch of the new aid initiative, thousands of hungry Palestinians rushed another food distribution site, prompting Israeli forces outside the compound to fire warning shots to disperse the crowds. The Gaza Humanitarian Foundation said on Thursday that “nonlethal means” had been used to disperse crowds that were refusing to leave the new aid hub, but that no one was injured. The foundation did not say who had opened fired. The Israeli military denied firing near the hub on Thursday. The foundation is run by private American companies, with Israeli forces guarding the compounds’ perimeter. Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times. Thank you for your patience while we verify access. Already a subscriber? Log in. Want all of The Times? Subscribe.