One in five people in the Gaza Strip are facing starvation as the entire territory edges closer to famine, a new United Nations-backed report warns, after nearly three months of Israel’s blockade of critically needed humanitarian aid.

Food security experts say the Gaza Strip is at critical risk of famine if Israel doesn’t lift its blockade and stop its military campaign.

Since Israel’s blockade began on March 2, food sources have been drying up. Aid groups have stopped food distribution. Bakeries have closed. Charity kitchens handing out bowls of pasta or lentils remain the last lifeline for most of the population, but they are rapidly closing for lack of supplies, the U.N. says.