A wave of attacks, including several car bombs has killed at least 55 people in the Iraqi capital, Baghdad.
Iraqi officials said a majority of the October 1 attacks targeted predominantly Shi'ite neighborhoods.
The deadliest attack hit the Kadhimiyah area, where two car bombs killed at least nine people.
No group has claimed responsibility.
The attacks came the same day that the United Nations' mission in Iraq said nearly 1,000 Iraqis were killed in violence in September, one of the highest monthly death tolls this year.
The UN figure of 979 victims is lower than the July death toll, which stood at 1,057.
The report says more than 2,100 people were injured in September violence across Iraq.
The worst-affected area was the capital, Baghdad, where 418 people were killed in violence.
Meanwhile, an Al-Qaeda front group has claimed responsibility for coordinated attacks that killed more than 50 people in predominantly Shi'ite areas in Baghdad on September 30.
In an online statement posted hours after the bombings, the Islamic State of Iraq and the Levant said the attacks were in retaliation for the "arrests, torturing, and targeting of Sunnis" by Iraq's Shi'ite-led government.
Iraqi officials said a majority of the October 1 attacks targeted predominantly Shi'ite neighborhoods.
The deadliest attack hit the Kadhimiyah area, where two car bombs killed at least nine people.
No group has claimed responsibility.
The attacks came the same day that the United Nations' mission in Iraq said nearly 1,000 Iraqis were killed in violence in September, one of the highest monthly death tolls this year.
The UN figure of 979 victims is lower than the July death toll, which stood at 1,057.
The report says more than 2,100 people were injured in September violence across Iraq.
The worst-affected area was the capital, Baghdad, where 418 people were killed in violence.
Meanwhile, an Al-Qaeda front group has claimed responsibility for coordinated attacks that killed more than 50 people in predominantly Shi'ite areas in Baghdad on September 30.
In an online statement posted hours after the bombings, the Islamic State of Iraq and the Levant said the attacks were in retaliation for the "arrests, torturing, and targeting of Sunnis" by Iraq's Shi'ite-led government.