Israel has failed to meet U.S. demands to allow greater humanitarian access to the Gaza Strip, where conditions are worse than at any point in the 13-month-old war, international aid organizations said Tuesday.

The Biden administration last month called on Israel to "surge" more food and other emergency aid into Gaza, giving it a 30-day deadline that was expiring Tuesday. It warned that failure to comply could trigger U.S. laws requiring it to scale back military support as Israel wages offensives against Hamas in Gaza and Hezbollah in Lebanon.