The Biden administration is stepping up criticism of Israel for not doing enough to improve humanitarian conditions in Gaza as a 30-day deadline looms for Israeli officials to meet certain requirements or risk potential restrictions on military assistance.

State Department spokesman Matthew Miller on Monday gave Israel a "fail" grade in terms of meeting the conditions for an improvement in aid deliveries to Gaza laid out in a letter last month to senior Israeli officials from Secretary of State Antony Blinken and Defense Secretary Lloyd Austin.