UNITED NATIONS — Yemen’s Houthi rebels used civilians as human shields, and ISIS militants in the country received an influx of cash, according to a confidential report by United Nations experts monitoring sanctions on Yemen.

The 105-page report to the U.N. Security Council, seen by Reuters on Thursday, also said a military coalition led by Saudi Arabia had violated international humanitarian law by bombing a civilian home in Al-Mahala village in May, and the monitors were investigating three other cases in which civilians were bombed.

The midterm report covered the past six months. The experts noted that they have been unable to travel to the Arabian Peninsula country, so they gathered information remotely.

“The panel has documented violations of international humanitarian law and international human rights law committed by the Houthi-Saleh forces, the Saudi Arabia-led coalition and forces affiliated to the legitimate Government of Yemen,” the panel said in the report. Saudi Arabia has said it is committed to international humanitarian law.

The Saudi-led alliance intervened in Yemen’s civil war in March of last year to support the government and fight forces loyal to ex-President Ali Abdullah Saleh and the Houthi movement, which it has accused of being a proxy for arch-rival Iran.

The U.N. report said the Houthis had concealed fighters and equipment in or close to civilians in Al Mukha in the Taiz Governorate, “with the deliberate aim of avoiding attack” and in violation of international humanitarian law.

Al-Qaeda in the Arabian Peninsula (AQAP) has taken advantage of Yemen’s civil war to take over parts of southern and eastern Yemen; and ISIS has also gained a foothold in the country.

The two groups’ are now “undermining one another as they compete for recruits,” the report said, adding that in March and April “ISIL received a significant influx of cash in Yemen, which it is using to attract recruits, finance operations, and purchase equipment.”