While the terror army ISIS is making millions of dollars a day through its oil sales, it also is profiting from trafficking in human organs, according to a number of reports that have raised the issue in recent months.

Even while the reports concede firm figures are practically impossible to corroborate, the Iranian news source Al-Alam said the chief of forensic pathology at Damascus University told the Syrian al-Watan that there have been more than 18,000 organ trafficking cases in the northern part of Syrian in recent years.

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The report from Hossain Noufel said many of the victims are children.

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"Syrian people … are now dealing with organ traffickers who are slicing off their own share from the unfortunate Syrian families," the report said.

And according to BioEdge, which monitors bioethics developments around the world, a physician from Mosul told the publication Al-Monitor that large-scale organ-harvesting is taking place in local hospitals and that ISIS "was reaping significant profits from the scheme."

The BioEdge report said the doctor, Siruwan Al-Mosuli, reported physicians were being hired to perform rapid organ removal operations from "recently deceased jihadis or captives."

They are then "swiftly" moved to local or foreign buyers, the report said.

The BioEdge report said the doctor reported ISIS even has a specialized force that deals with organ trafficking.

The report said allegations of human organ trafficking are not uncommon in "bitter conflicts" such as the ISIS aggression in Syria and Iraq, and a number of other sources corroborate the claims.

It cited the Al-Alam report and another at Vocativ.com.

Al-Monitor reported ISIS funding includes revenue from "oil and human trafficking mafias."

"According to sources in Mosul, the money supplied internally is allocated to local and foreign fighters, to encourage them to join up and continue fighting. IS took control of Mosul in June and then expanded in August to control large swaths of the country," the report said.

"Residents of Mosul say that the sale of oil extracted from wells controlled by the organization in both Iraq and Syria has provided a sustained source of funding. The organization also opened trade canals through Kurdish [territories in] Iraq and Turkey, with the help of Kurdish, Turkish and Iranian traders."

It said other income is from "protection fees" as well as even more nefarious schemes, such as organ trafficking.

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Said the report: "The third funding source was exposed by otolaryngologist Siruwan al-Mosuli. He said that lately he noticed unusual movement within medical facilities in Mosul. Arab and foreign surgeons were hired, but prohibited from mixing with local doctors. Information then leaked about organ selling. Surgeries take place within a hospital and organs are quickly transported through networks specialized in trafficking human organs. Mosuli said that the organs come from fallen fighters who were quickly transported to the hospital, injured people who were abandoned or individuals who were kidnapped."

Al-Monitor continued: "He said that organ sales yield large profits. A specialized mafia is engaged in these operations, in addition to medical institutions working in other countries. Without coordination among these parties, such a trade cannot be sustained, he said. According to the Office of the High Commissioner for Human Rights (OHCHR), the organization sells bodies and organs of injured people they arrest."

At Al-Alam, Noufel said traffickers find easy pickings because refugee camps are not supervised by the United Nations.

He said the cases extended not just to human organ trafficking but also human trafficking, with tens of thousands of cases reported over the last 36 months and "schools and hospitals have been a common target for the militant groups."

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Vocativ.com said the organ "donations" sometimes even are voluntary.

The reported cited the case of "Mohammed," a 21-year-old living in Lebanon who sold a kidney for $5,000 cash on the black market.

"I was in need of money," he told the agency.

According to the report: "'When I first arrived in Lebanon I sold vegetables on the street, but the money was not enough to survive,' Mohammed says, short of breath and wincing with nearly every word. 'If I was lucky, I would make $70 a week. Then my cousin told me that he sold his kidney for $5,000, so I asked him to introduce me to these people.'"

The report said it was "Abu Jamil" who contacted the young man. Jamil, the report said, "sells cocaine, hashish and, more recently, human kidneys."