A top Iraqi diplomat told world leaders that ISIS is harvesting the organs of its victims to fund its murderous operations, the latest charge of barbarity in a list that already includes mass beheadings, burning people alive, crucifying children and throwing people off buildings.

The shocking new claim was presented by the Iraqi ambassador to the United Nations, who said bodies have turned up in mass graves bearing surgical incisions and missing organs such as kidneys. Ambassador Mohamed Alhakim leveled the charge as he asked the Security Council to investigate whether ISIS is harvesting and selling the organs of those it executes. The claim followed an unconfirmed report late Tuesday that as many as 45 people captured by the Islamic State in the Anbar province town of al-Baghdadi had been rounded up and burned alive.

“We have bodies,” Alhakim told his international counterparts. “Come and examine them. It is clear they are missing certain parts.”

Alhakim, who said a dozen doctors have been executed in Mosul for refusing to participate in organ harvesting, briefed the council on the overall situation in Iraq and accused the Islamic State group of “crimes of genocide” in targeting certain ethnic groups. The outgoing UN envoy to Iraq, Nikolay Mladenov, told the council that 790 people were killed in January alone by terrorism and armed conflict.

Mladenov noted the increasing number of reports and allegations that the Islamic State group is using organ harvesting as a financing method, but he said only that “it’s very clear that the tactics ISIL is using expand by the day.” He used an alternate acronym for the group.

He said Iraq’s most pressing goal is to win back the vast territory that the Islamic State has seized in the past year. The Sunni militants seized a third of both Iraq and neighboring Syria and imposed strict Sharia law.

“Especially worrying is the increasing number of reports of revenge attacks committed particularly against members of the Sunni community in areas liberated from ISIL control,” Mladenov said.

The identities of the victims who were reportedly burned alive Tuesday in al-Baghdadi are not clear, the local police chief told the BBC. ISIS fighters reportedly captured most of the town last week.

Col. Qasim Obeidi, pleading for help from the Iraqi government and international community, said a compound that houses families of security personnel and officials was now being targeted.

We have bodies. Come and examine them. It is clear they are missing certain parts. - Ambassador Mohamed Alhakim

The reports come days after ISIS released a video purportedly showing the beheadings of 21 Egyptian Coptic Christians along a beach in Libya, sparking an international outcry, including condemnation from Pope Francis, who called the killings “barbaric.”

Earlier this month, ISIS released another video showing a fleet of vehicles flying the black ISIS flag and driving through what is believed to be the streets of Benghazi, Libya. The video shows the vehicles being cheered by men, women and children as they drive by.

On Friday, a media group linked to ISIS released a four-minute video titled “Peshmerga Captives in Kirkuk Province,” which purportedly showed Kurdish prisoners — imprisoned in iron cages — being driven around on trucks in Iraq, according to the Middle East Media Research Institute.

The images of the prisoners in orange uniforms were similar to the scenes of an execution of a Jordanian pilot. In a video released by ISIS two weeks ago, Lt. Muath al-Kaseasbeh was shown being burned alive in a cage.

Al-Baghdadi, which is about 50 miles northwest of Ramadi in Anbar province, is located about five miles from Ain al-Asad air base, where 400 US military personnel are training Iraqi soldiers and Sunni tribesmen to take on ISIS. The base was raided last week by a small band of fighters, in what some experts believe may have been a probe in preparation for a full-scale attack.

The base has been the target of sporadic mortar fire in past weeks, and the jihadist army has been moving forces from its strongholds in Syria to Anbar province, possibly setting the stage for a major clash with forces on the base that is now the sole bulwark between ISIS and Baghdad.

There are currently nearly 2,600 US troops in Iraq, including about 450 who are training Iraqi soldiers at three bases across the country, including al-Asad. Forces from other coalition countries conduct the training at the fourth site, in the northern city of Irbil.

But even if Islamic State militants close in on the base, taking it would require a massive force, which would present a target for airstrikes, retired Col. Thomas Lynch, a National Defense University fellow, told Fox News.

The Associated Press contributed to this report.