People stand at the site of a car bomb attack in Baghdad
People stand at the site of a car bomb attack in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ - Tags: CIVIL UNREST CRIME LAW)
Youth cycles past a man clearing up at the site of a car bomb in Baghdad
A youth cycles past a man clearing up at the site of a car bomb in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ - Tags: CIVIL UNREST CRIME LAW TRANSPORT)
Burnt vehicle is removed from the site of a car bomb attack in Baghdad
A burnt vehicle is removed from the site of a car bomb attack in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ - Tags: CIVIL UNREST CRIME LAW)
People stand at the site of a car bomb attack in Baghdad
People stand at the site of a car bomb attack in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ - Tags: CIVIL UNREST CRIME LAW)
People stand at the site of a car bomb attack in Baghdad
People stand at the site of a car bomb attack in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ - Tags: CIVIL UNREST CRIME LAW)
People gather at the site of a car bomb attack in Baghdad
People gather at the site of a car bomb attack in Baghdad's al-Shaab district, October 27, 2013. Ten car bombs exploded across Baghdad province early on Sunday, killing at least 37 people, police and medics said. REUTERS/Thaier Al-Sudani (IRAQ- Tags: CIVIL UNREST CRIME LAW)
Ten car bomb blasts across Baghdad province kill 37
Shi'ites have been targeted by Sunni Muslim insurgents including al Qaeda who have been regaining momentum this year after being forced underground in 2007
People sit inside an abandoned building near polling stations in town of Abyei
People sit inside an abandoned building near polling stations in the town of Abyei, ahead of the referendum October 26, 2013. Residents of the remote and disputed Abyei border region say they will press on with their own referendum on whether to join Sudan or South Sudan, despite warnings it could trigger violence in the already volatile area. REUTERS/Goran Tomasevic (ABYEI - Tags: CIVIL UNREST POLITICS ELECTIONS SOCIETY)
A woman looks out of an abandoned building near polling stations in the town of Abyei
A woman looks out of an abandoned building near polling stations in the town of Abyei, ahead of the referendum, October 26, 2013. Residents of the remote and disputed Abyei border region say they will press on with their own referendum on whether to join Sudan or South Sudan, despite warnings it could trigger violence in the already volatile area. REUTERS/Goran Tomasevic (ABYEI - Tags: CIVIL UNREST POLITICS ELECTIONS SOCIETY)
A man wears an Abyei referendum T shirt as he plays volleyball in the town of Abyei
A man wears an Abyei referendum T shirt as he plays volleyball in the town of Abyei, ahead of the referendum October 26, 2013. Residents of the remote and disputed Abyei border region say they will press on with their own referendum on whether to join Sudan or South Sudan, despite warnings it could trigger violence in the already volatile area. REUTERS/Goran Tomasevic (ABYEI - Tags: CIVIL UNREST POLITICS ELECTIONS SOCIETY)