The U.N. Security Council is investigating claims that the terror group ISIS is using blood money to support their cause - blood money from selling harvested organs, according to the New York Daily News.

During the last several weeks, shallow mass graves have been uncovered in Iraq, filled with bodies marked by surgical incisions and missing organs, such as kidneys. According to the Daily News, Iraqi Ambassador Mohamed Alhakim said on Tuesday that 12 doctors were executed in Mosul for refusing to take part.

ISIS is guilty of "crimes of genocide," said Alhakim, according to the Daily News, because they have been targeting specific ethnic groups.

Apart from the gruesome fundraiser, the U.N. envoy to Iraq told the council that 790 people were killed in January due to the conflict with ISIS.