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Civilians gather at the site of a car bomb attack at Jadidat al-Shatt in Diyala province, 40 km (25 miles) north of Baghdad, June 10, 2013. At least 13 people were killed when two car bombs and a suicide attacker targeted a grocery market in a mainly Shi'ite Muslim town north of Baghdad, police and local officials said on Monday. No group claimed the attack on Jadidat al-Shatt in Diyala province, 40 km (25 miles) north of Baghdad, but Iraq is facing a surge in sectarian violence officials blame on Sunni Islamist insurgents determined to drag the country into a civil war. REUTERS/Stringer (IRAQ - Tags: CIVIL UNREST POLITICS) Image Credit: REUTERS

Baghdad: A wave of attacks mostly targeting security forces in Sunni areas of Iraq killed at least 73 people, officials said Tuesday, updating the toll from the violence a day earlier.

Monday’s unrest, which wounded more than 250 people, is the latest in a surge in bloodshed that, along with a long-running political stalemate, has stoked fears of a return of the all-out sectarian war in Iraq in 2006 and 2007. It also shattered hopes a recent series of symbolic political gestures had managed to ease tensions.

No group immediately claimed responsibility for the bloodshed, but Sunni militants linked to Al Qaida have in the past launched coordinated nationwide bombings in a bid to undermine confidence in the security forces and the Shiite-led authorities. They have also targeted fellow Sunnis, ostensibly in a bid to provoke retributive violence against Shiite Muslims.

The deadliest violence on Monday hit the predominantly-Sunni Arab city of Mosul, with a series of five car bombings mostly targeting security forces killing at least 29 and wounding 80 others, officials said. Meanwhile, attacks near Saddam Hussain’s birthplace of Owja, the town of Dour and in Taji-all predominantly Sunni areas-killed a further 13 people.

And 12 more people died in violence in the northern province of Kirkuk and the nearby towns of Tuz Khurmatu and Sulaiman Bek. The towns, which have mixed Sunni Arab, Kurdish and Turkmen populations, are seen as a tinderbox because they are part of a swathe of territory claimed by the central government and the autonomous Kurdish region.

Blasts in the mixed town of Madain and Shiite neighbourhoods of Baghdad killed six more people, while three near-simultaneous bombings in a mostly-Shiite town in restive Diyala province killed 13.

The unrest comes amid a surge in attacks in Iraq, with violence in May pushing the month’s death toll to its highest level since 2008, raising concerns of a revival of the all-out sectarian war that blighted the country in 2006 and 2007. There has been a heightened level of attacks since the beginning of the year, coinciding with rising discontent among the Sunni Arab minority that erupted into protests in late December.

The outgoing United Nations envoy to Iraq Martin Kobler has warned the violence is “ready to explode”.