A stomach-turning new video released Friday by ISIS shows the depraved terrorist army’s so-called “cubs” executing five Kurdish fighters, as well as a twisted montage of mass murder in the name of Allah.

The 9-minute video was posted online by ISIS leaders in its stronghold of Raqqa, Syria, under the title, "The Nations [are] Uniting Against You." It was first reported by Middle East Media Research Institute, which tracks terrorist groups’ communication throughout the region.

"What lies between me and you are days that make young men turn old,” warns one child identified as Abu Al-Baraa Al-Tunisi, as he and the others point handguns skyward. “The war against you has not started yet and the U.S., France, the U.K., Germany, and neither humans nor Jinn devils will avail you. Prepare you coffins, dig your graves, and await a fate similar to that of these men."

With that, the children, who appear to be as young as 10 years old, shout “Allah Akbar,” lower their guns and shoot the kneeling men in the backs of their heads.

The other children are identified as Yousouf Al-Ozbaki, Abu Fuad Al-Kurdi, Abu Ishaq Al-Masri and Abu Abdalla Al-Britani, whose name indicates he is British.

ISIS has released several videos showing its enemies’ executions, including some by children. But Friday’s video was believed to be the first showing a mass execution carried out by multiple children, who are known as the “cubs” of the black-clad jihadist group.

"ISIS wants to you to know that their children will continue their jihad, and that killing current fighters isn't much of a net gain if their many offspring will replace them," said Ryan Mauro, a national security analyst with Clarion Project, which tracks the international terrorist threat. "For ISIS, this is a show of strength; that even their little kids are capable of violent devotion beyond what their enemies' adults can muster."

The video begins with masked fighters beheading and shooting five men accused of being members of Sahawat militias. One of the fighters delivers a message to the Sahawat calling on them to repent before ISIS finds them.

"Allah's willing," he said "we will cut off your heads and purify the earth of your filth," the fighter states.

The video intersperses scenes of kiling with depictions of destruction across ISIS' caliphate and civilians who purportedly were killed in allied airstrikes.

The group also levels threats at President Obama and Syrian dictator Bashar al-Assad.

The video ends with an ISIS fighter threatening Shia Muslims, who have historically been at odds with the Sunnis who include ISIS.

"Today, we kill your sons here, and tomorrow [we will kill them] in Qardaha, Tartus and Lattakia, Allah's willing," before he and three other fighters execute four men accused of being Syrian soldiers.