At least 14 people were killed and hundreds more injured in a series of apparently coordinated explosions in cities across Iraq.
The death toll in a string of attacks in Baghdad, mostly against government and Shiite targets, is up to 68. The attacks follow days of political threats against Sunni politicians by Shiite Prime Minister Nouri al-Maliki.
A trawl through US diplomatic cables released by Wikileaks this year shows growing alarm over Iraq's political divides.
The scars of Iraq's painful bloodletting are deep, and a powerful disincentive against a return to open warfare. But Shiite Prime Minister Nouri al-Maliki is moving against Sunni Arabs, his political enemies.
US military marked the end of its Iraq operations in a ceremony attended by Vice President Joe Biden and Iraqi Prime Minister Nouri al-Maliki. The remaining 13,000 US troops are due to withdraw by end of year.