The grim video was shared on Twitter by a Kurd supporter activist known as  Dr Partizan.

In posting the clip, he wrote: 'This is your fate if you try to attack Efrin fighters, dozens of terrorist killed in just one day.'

He later added detail about the number of ISIS terrorist killed and injured during a failed offensive on the outskirts of Efrin a day earlier,acording to Daily Mail.

His figures allege the 83 extremists died while more than 100 were left wounded. 

As well as his video, Dr Partizan uploaded photographs showing a huge cache of rifles, heavy machine guns and rocket-propelled grenade launchers, all thought to have been seized by the Kurd fighters.

Kurdish forces in Syria have been battling IS since 2014.In recent months the Kurds have inflicted a series of defeats on the terror network in northern Syria, with the help of US-led coalition airpower.

Fighting under the banner of the Syrian Democratic Forces (SDF), the YPG has emerged as a key ally of the coalition, which considers it one of the few effective partners on the ground in Syria.