United Nations experts have called on Britain and the United States to stop selling weapons to Saudi Arabia for use in its campaign in Yemen.
A report for the UN Human Rights Council cites growing evidence that Western-made bombs are being used in potential war crimes in the conflict.
Britain and US supply Saudi Arabia with munitions that are used in Yemen. A US laser-guided bomb is believed to have been used in a strike this month that killed 40 children.
The report said all sides in the war — the Yemeni Government and its Saudi-led backers as well as the Houthi rebels — may have committed war crimes.
At least 6475 civilians have been killed since the Saudi intervention in Yemen began in March 2015 but the report warns that the real figure is likely to be "significantly higher".