A report by a panel of food security experts that found famine in parts of Gaza prompted outrage from many European countries, but not from the United States, Israel’s main backer.

Neither the White House nor the State Department has directly addressed the report, which blamed Israeli restrictions on aid, among other factors, for the famine. Prime Minister Benjamin Netanyahu of Israel on Friday called the report “an outright lie,” saying that Israel had “gone to unprecedented lengths to enable aid to go into enemy territory.”