Palestinian health officials and witnesses say Israeli forces fired on people as they headed toward an aid distribution site on Tuesday, killing at least 27, in the third such incident in three days. The near-daily shootings have come after an Israeli and U.S.-backed foundation established aid distribution points inside Israeli military zones, a system it says is designed to circumvent Hamas. The United Nations has rejected the new system, saying it doesn't address Gaza's mounting hunger crisis and allows Israel to use aid as a weapon.