Bomb attacks around Iraq on Sunday killed at least 58 people, a day after a security conference in Baghdad.
The killings continued despite the fact that US forces said they captured 15 "suspected terrorists" in various raids in central Iraq.
In the worst attack, a car bomb attack in Baghdad's downtown Karrada district killed 31 Shiite devotees and wounded 25 more as their convoy returned from Karbala. Of the wounded, five were in critical condition, according to a medic at Baghdad's Ibn Nafis hospital.
Five construction workers died and 10 were injured when their minibus hit a roadside bomb near Baladruz, 100 kilometres northeast of Baghdad, in the province of Diyala, police said.
In the northern city of Mosul, a bomb ripped through the office of the Islamic Party, killing four people, said police Brigadier General Mohammed al-Wagga, according to AFP. Party official Mohammed Shakir al-Ghanam conveyed three of the victims were guards and the fourth a suicide bomber.
Meanwhile, two policemen died and seven were injured as they tried to defuse a roadside bomb south of Baghdad.
Two women were also killed when their car was hit by a roadside bomb in nearby Mahmudiyah. Another woman and infant were also injured in the same attack, police said, while gunmen shot two civilians in Baghdad's southern suburbs.
Meanwhile, Iraqi Foreign Minister Hoshyar Zebari hailed Saturday's regional talks as "positive and constructive" and said the countries had agreed on the creation of three technical committees on security cooperation, Iraqi refugees and energy.
In an interview with US television network NBC's Meet the Press programme, to be broadcast Sunday, US Ambassador to Iraq Zalmay Khalilzad said he spoke with the Iranian envoy for a few minutes at the opening of the summit. While there were no "substantive" direct talks, Khalilzad said he raised US allegations that Iran was supplying arms and other support to Iraqi armed groups.
"Will they stop supplying arms and training and money to militias and other unauthorised groups?" Khalilzad asked.
