NUSEIRAT, Gaza Strip (AP) — Chaos erupted again as tens of thousands of desperate Palestinians tried to collect food from distribution sites in the Gaza Strip run by a new U.S.- and Israeli-backed foundation. Multiple witnesses on Thursday reported a free-for-all of people grabbing aid, and they said Israeli troops opened fire to control crowds. In central Gaza, Associated Press video showed smoke bombs arching through the air around a distribution center, and gunfire was audible as an Israeli tank moved nearby. Witnesses said it was Israeli troops who fired the projectiles to clear large crowds of Palestinians after the center ran out of supplies. The Israeli military said Hamas was responsible for the crisis by stealing aid and refusing to release the remaining hostages in Gaza.