Three suicide attacks claimed by Islamic State of Iraq and Syria (ISIS) killed at least 60 people in southern Iraq on Thursday, a health official and police sources said, suggesting a shift in the ultra-hardline group's tactics since it lost control of its stronghold in Mosul.
Iraqi and Kurdish security officials say the Sunni militants are likely to wage a guerrilla war in Iraq after their self-proclaimed caliphate in Mosul collapsed.
ISIS is also under siege in the Syrian city of Raqqa, its operational base for attacks in the Middle East and the West.
Security officials described Thursday’s attacks as an attempt to send a message to ISIS followers that the group is still strong and can operate in other parts of Iraq following its territorial losses.
"After losing the war in Iraq and the shrinking of its power, Daesh returned back to its old style of an insurgency, by carrying out suicide attacks, which is a clear sign that the terrorist group is retreating," said police intelligence colonel Murtatha al-Yassiri.
ISIS activity is usually concentrated in western and northern Iraq. Bomb attacks in the mostly Shi'ite south, where the bulk of the country's oil is produced and security forces hold a tighter grip, have so far been relatively rare.
Like its predecessor in Iraq, al Qaeda, ISIS seeks to create sectarian tensions as a way to destabilise the OPEC oil producer.
"We expect more alike terrorist operations in future. Daesh is trying to desperately pretend among followers that it's still strong," al-Yassiri said.
Wearing security force uniforms and driving stolen army vehicles, the attackers targeted a police checkpoint and two restaurants on a highway near the city of Nassiriya, using car bombs and suicide vests, the sources said.
At least 100 people were injured, the police said in a statement.
ISIS claimed responsibility in a statement on its Amaq news agency. The group said it had killed "dozens of Shi'ites".
The head of Nassiriya's health directorate, Jassim al-Khalidi, said the city's hospital had received 50 bodies and the death toll could rise because some of the wounded were in critical condition.
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