Horrific video has emerged online showing ISIS savages purportedly executing a young man with a bazooka.

The footage was posted Thursday by a Syrian activist group, Raqqa Is Being Slaughtered Silently.

The clip, which is about 2½ minutes long, shows the prisoner exploding in a ball of flames as his Islamic State executioners blast their guns in the air and cheer in celebration.

The man is said to be Ibrahim Shraideh, a member of the Al Shaitat tribe from the town of Abu Hamam in Syria’s Deir ez-Zor province. He was captured and killed on charges of waging war against ISIS, according to the activist group.

The bloodthirsty jihadis who put Shraideh to death are said to be from Tunisia and Morocco. The execution video is believed to have been shot Wednesday, the group said.

When the clip begins, things appear calm as one of the ISIS militants chit-chats with Shraideh. Suddenly, the long-haired radical leans down, picks up a rocket-propelled grenade and begins angrily ranting.

Moments later, the Islamic State fighters back up, the man takes aim — and fires.