Isis has paraded captured Kurdish soldiers in cages through screaming crowds in what some fear is a prequel to them being burned alive.
A video of the procession has appeared on Isis-affiliated social media accounts, showing the prisoners in orange jumpsuits and flanked by black-clad militants brandishing Kalashnikovs and the group’s black flag.
People lining the streets could be heard jeering and shouting “Allahu Akbar” as they passed one by one on the back of flat bed vans.
The captured soldiers were each forced to stand alone in a cage similar to that used in the murder of Jordanian pilot Muath al-Kasaesbeh as the convoy crawled through the town.
The footage was believed to have been filmed in Hawija, in Iraq’s Kirkuk province, although the date could not be confirmed.
Ari Mamshae, an Erbil-based senior civil servant in the Kurdish President’s office, said Isis had vowed to murder the 17 abducted Peshmerga fighters.
“They say they will burn them,” he wrote on Twitter.
Although the threats could not be verified, the plan would echo the death of Lieutenant al-Kasaesbeh.
In pictures: Anti-Isis protests in Jordan
In pictures: Anti-Isis protests in Jordan
1/15 Amman, Jordan
Members of Jordan's Al Assaf tribe burn a ''Wanted Dead'' poster of Islamic State leader Abu Bakr al Baghdadi at a rally
2/15 Amman, Jordan
Jordanian protesters carry an effigy of leader of the militant Islamic State Abu Bakr al-Baghdadi, during a march after Friday prayers in downtown Amman
3/15 Amman, Jordan
Jordanian Queen Rania (C) holds a placard during a demonstration to express solidarity with the pilot murdered by the Islamic State
4/15 Amman, Jordan
A protester dressed in a Jordanian flag joins others as they hold up pictures of Jordanian King Abdullah and Jordanian pilot Muath al-Kasaesbeh, while chanting slogans during a march against Islamic State
5/15 Amman, Jordan
Jordanians hold banners shouting slogans during a demonstration to express their solidarity with the pilot murdered by the Islamic State
6/15 Amman, Jordan
Jordanians carry banners and pictures of executed Jordanian pilot Muath al-Kassasbeh while shouting slogans against the group calling themselves the Islamic State, during a march after noon pray in downtown Amman
7/15 Amman, Jordan
Protesters hold up pictures of Jordan's King Abdullah and pilot Muath al-Kasaesbeh as they chant slogans during a rally in Amman to show their loyalty to the King and against the Islamic State
8/15 Amman, Jordan
Jordanians chant slogans to show their support for the government against terror during a rally
9/15 Amman, Jordan
Jawdat al-Kaseasbeh, a brother of slain Jordanians pilot Muath al-Kaseasbeh, reacts to people gathering to show their support for the government against terror during a rally
10/15 Amman, Jordan
A Jordanian protester kisses a poster bearing the image of Jordanian pilot Muath al-Kasaesbeh during a rally to show their loyalty to King Abdullah and against the Islamic State
11/15 Amman, Jordan
A Jordanian shouts slogans during a rally against the Islamic state group and in reaction to the burning alive of Jordanian pilot Maaz al-Kassasbeh by the group's militants
12/15 Amman, Jordan
Jordanians carry pictures of pilot Maaz al-Kassasbeh at a protest against Islamic State
13/15 Amman, Jordan
Supporters and family members of Jordanian pilot Lt. Muath al-Kaseasbeh express their anger at his murder at the tribal gathering chamber in Amman, Jordan
14/15 Aye Village, Karak, Jordan
The King of Jordan, Abdullah II (L), embracing Safi al-Kassasbeh (R), the father of the recently executed Jordanian pilot
15/15 Aye Village, Karak, Jordan
Jordan's Queen Rania offers her condolences to the family of Jordanian pilot Muath al-Kasaesbeh, at their family home of Muath
REUTERS/Petra News Agency
The captured pilot had been shot down over Syria in December and intelligence sources believe he was killed in January.
Isis did not publish the gory propaganda video featuring his death – being doused in petrol and burned alive in a cage – until weeks later after claiming to be open to negotiating a prisoner exchange.
Jordan immediately executed two Isis-affiliated prisoners in retaliation and increased its air strikes against the group, which militants claimed killed American hostage Kayla Jean Mueller.
The Independent’s Middle East correspondent, Robert Fisk, said Isis burned captive Syrian soldiers to death months before Lieutenant al-Kasaesbeh's murder.
“Isis put captive Syrian soldiers to the torch – and then barbecued their heads on video,” he reported.
Most of Isis’ foreign hostages have been beheaded, including British aid workers David Haines and Alan Henning, and most recently Japanese journalist Kenji Goto.
The group has also filmed Peshmerga commanders being decapitated - most recently murdering Hujam Surchi earlier this month.
The Kurdish fighting force has been the group’s main opposition in Kirkuk and around Hawija, which was abandoned by the Iraqi army last year.
Isis fighters and the Peshmerga have been battling for control of the city of Kirkuk as well as waging a propaganda war on social media.
Kurds have posted graphic pictures of killed Isis militants, while the jihadists appear to be taunting them with the latest video of their comrades.
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