Up to 30 people died and 40 were wounded in a suicide bomb attack at a mosque in Mussaiyb town just south of Baghdad, police said.
The bomb exploded at a funeral held at the mosque, a local police official told Chinese news agency Xinhua on condition of anonymity.
A series of five car bombs were set off in the city of Erbil, killing up to six people and injuring seven others. The bombs were detonated near the headquarters for security forces, or Asayish, in the capital of the semiautonomous Kurdish region, IraqiNews.com reported.
An armed attack took place after the bombings, a security official said.
"The situation is under control of the security forces after they killed four terrorists and two suicide car bombers," Nozad Hadi, the governor of Erbil said.
In other parts of Iraq Sunday:
-- A car bomb in Husseiniyah district killed two people and injuring eight others, an Interior Ministry official told Xinhua.
-- A sticky bomb attached to a civilian car seriously injured the driver in Baghdad's southern district of Doura.
-- A gunman shot dead two people in Maqdadiyah.
-- Gunmen shot dead a barber outside his home in Baquba.
-- A sticky bomb attached to a civilian car injured two people in Baquba.
-- Gunmen shot dead a Sahwa paramilitary fighter and injured three others in a gunfight at a checkpoint in west Baquba.