Iraqi forces launched a major operation against remnants of Islamic State following public anger over the jihadists’ murder of a group of abducted civilians.

Dubbed “Vengeance for the Martyrs,” the operation will see army, special forces, police and Kurdish peshmerga fighters hunting down IS cells in the centre of the country, Iraq’s Joint Operations Command said in a statement on Wednesday, July 4.

It comes after the bodies of eight ISIS captives were found late last month along a highway north of Baghdad. Some of the abductees had appeared in a video in which ISIS threatened to execute them unless Baghdad released female prisoners.

The JOC statement said army, federal police, special forces, peshmerga fighters and the Hashd al-Shaabi paramilitary force had launched “a vast operation to clear out the region east of the Diyala-Kirkuk” highway.

The operation was being supported by the Iraqi air force and the U.S.-led Coalition that intervened against ISIS in Iraq and Syria after the jihadists seized control of large parts of both countries in 2014.

One ISIS fighter had already been killed and eight captured, the JOC said, and equipment including vehicles and bombs destroyed.

#الشرطة_الاتحادية وضمن عملية "ثأر الشهداء " لتطهير المناطق الكائنة شرق طريق ديالى – والتي انطلقت صباح اليوم تتمكن من قتل ارهابي وتدمر عجلة مفخخة وتعثر على هاون عيار 120 ملم وتدمر أيضا 9 مضافات وتلقي القبض على 9 من المشتبه بهم وتعثر على مركز طبابة واخر لتدريب عناصر داعش — الجيش العراقي الوطني (@ArmY_Iq) July 4, 2018

The operation marked the first time that federal Iraqi forces and the peshmerga were working together since clashes following last year’s Kurdish independence referendum.

Iraq declared victory over ISIS in December after expelling the jihadists from all major towns and cities in a vast offensive.

But the Iraqi military has kept up operations targeting mostly remote desert areas from where ISIS fighters have continued to carry out attacks.

Prime Minister Haider al-Abadi had vowed to avenge the eight civilians killed by ISIS and ordered the execution of hundreds of convicted jihadists. Thirteen prisoners on death row were executed last week.

With reporting from AFP