U.N. Secretary-General Ban Ki-moon has said he will continue to review whether to keep Saudi Arabia’s military on a U.N. list of militaries that kill children. The U.N. placed Saudi Arabia on the list last month over its conduct in Yemen. The Saudis complained, and Ban told them to provide evidence that they were taking steps to prevent child casualties. Ban defended the decision on Tuesday.

Secretary-General Ban Ki-moon: “The content of the report stands. Let me be clear: The report and its annexes may cause discomfort, but that is not the goal in itself. Our aim is to protect the children in danger by ensuring concrete change.”

The U.N. says the U.S.-backed, Saudi-led bombing campaign in Yemen killed at least 500 children last year.