Smoke billows from a fire at a Houthi-controlled military site after it was hit by a Saudi-led air strike in Sanaa, Yemen, June 3, 2015

The United Nations Security Council should consider creating an international commission of inquiry to investigate alleged human rights abuses by all sides in Yemen’s conflict, a panel of U.N. experts says.

The Associated Press on Tuesday obtained a copy of the panel’s annual report, which has not been released publicly. The panel monitors U.N. sanctions.

The report also says civilians in the Arab world’s poorest country are suffering under tactics in the conflict that “constitute the prohibited use of starvation as a method of warfare.”

A Saudi Arabia-led coalition last year launched air strikes and then a ground operation against Shiite Houthi militias allied with a former president who had captured large swaths of the country, including the capital, Sanaa. Observers have warned that the chaos is making room for militant groups like ISIS to expand.

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