Five families were forced to watch their loved ones get beheaded in a packed street by ISIS after extremists accused them of being spies.

The executioner, who did not hide his identity by wearing only a baseball cap, black clothes and boots as he carried out the savage slaughters, killed five civilians on Sunday in Syria's northeastern Raqqa province.

The victims were captured by the terror group in Tabqa on Saturday, and after being found guilty of communicating with Kurdish troops by their internal Sharia Court of Raqqa, were sentenced to public death.

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The executioner, who did not hide his identity by wearing only a baseball cap, black clothes and boots as he carried out the savage killings, killed five civilians on Sunday in Syria's northeastern Raqqa province

ISIS' police had arrested the five young men in the city of Tabqa in the Raqqa countryside the day before they were publicly slaughtered for being accused of supplying information to forces of the People's Protection Units (YPG) in northeastern Syria.

'They were publicly beheaded after the Sharia Court of Raqqa convicted them of spying for hostile YPG troops,' a local source told AhlulBayt.

'They were beheaded in front of a large crowd that included their family members,' the source said.

The Raqqa countryside is not an Islamic State stronghold, and Kurdish YPG fighters and allied Syrian Democratic Forces (SDF) have been battling for the territory having all but driven ISIS out of the area.

Kurdish YPG fighters and allied Syrian Democratic Forces (SDF) have recently launched a battle for Raqqa countryside and expelled ISIS from large territories in the northern countryside.

Despite this, Raqqa has essentially become the ISIS capital.

It is here the jihadi Bulldozer - a 20 stone executioner - has been beheading victims.

He has been become infamous for swinging around a 4ft sword in military gear and a balaclava before fatally bringing it down on civilians' heads in the Raqqa streets.