Gaza's Health Ministry says at least 73 Palestinians have been killed while trying to reach aid in one of the deadliest days yet for aid-seekers in more than 21 months of war.

Sunday's escalation adds to the growing humanitarian crisis in Gaza. On Saturday alone, Israeli airstrikes and gunfire killed over 130 Palestinians throughout the territory, including 38 individuals who were awaiting humanitarian aid and three children who succumbed to severe malnutrition, according to official Palestinian sources.

And Israeli-backed American organization in Gaza says 20 Palestinians died in a stampede at a food distribution center.