DEIR AL BALAH, Gaza Strip — Aid groups are raising new alarm over Israel’s blockade of the war-ravaged Gaza Strip, where it has barred entry of all food and other goods for more than six weeks. Thousands of children have become malnourished, and most people are barely eating one meal a day as stocks dwindle, the United Nations says.

Israel said Wednesday it would keep blocking humanitarian aid from entering Gaza, where a relentless military offensive has tur

The United Nations warned that the humanitarian situation in Gaza was likely at its worst since the conflict began and that the population was again on the brink of famine.