More than 30 co-ordinated blasts across Iraq have killed at least 52 people and wounded nearly 250.
The attacks come on the ninth anniversary of the US-led invasion of Iraq and ahead of next week's Arab League summit in Baghdad.
The Iraqi government has insisted it can maintain security in the country ahead of next week's Arab League summit in Baghdad.
Reminders of Iraq's recent past, and alarm about its future echoed around some of its cities in deadly explosions.
Bomb attacks across Iraq have killed at least 51 people and wounded more than 200.