Iraqi officials say at least 58 people have been killed in a series of bombings -- most of them targeting Shi'ites in the capital Baghdad.
Multiple explosions occurred in Sadr City, a Shi'ite neighborhood in Baghdad. Security officials say at least one car bomb exploded near the office of anti-U.S. cleric Moqtada al-Sadr, killing 25 people and injuring at least 100. Officials say other bombings in the area targeted Shi'ite mosques and a marketplace.
Ambulance sirens wailed as panicked residents rushed to aid the injured. Soon after the explosions, crowds gathered to survey the damage. Video from the scene showed several burned-out vehicles, wrecked buildings and streets covered in blood.
The violence comes days after Iraqi officials announced the killings of two top leaders of al-Qaida in Iraq. The group has been blamed for much of the violence in Baghdad.
The number of attacks in the capital began rising after parliamentary elections in March, which yielded no clear winner. Authorities fear the country's uncertain political future is fueling the renewed violence.
Earlier Friday, in western Anbar province, Iraqi police said a series of roadside bombs killed at least six people and wounded 10 others.
Authorities say at least four explosions took place near houses owned by police officers and a judge in the town of Khalidiya.
It was not immediately clear if security forces were among the casualties.
Violence has been relatively low in Anbar since 2006, when Sunni militant leaders turned against al-Qaida and started to help U.S. and Iraqi forces fight insurgents.