Baghdad: A wave of attacks mostly targeting security forces in Sunni areas of Iraq killed at least 73 people, officials said on Tuesday.

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-Qaeda 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 Islamic State of Iraq, Al-Qaeda's front group in the country, views Shiites as apostates.

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 Hussein's birthplace of Owja, the town of Dour and in Taji -- all predominantly Sunni areas -- killed 13 people. 12 more people died in violence in the northern province of Kirkuk and the nearby towns of Tuz Khurmatu and Suleiman Bek.

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 UN envoy to Iraq Martin Kobler has warned the violence is "ready to explode".


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