A series of 11 blasts targeting security officers have hit the central city of Baquba, 60km north of Baghdad, in Iraq.
Two children and a policeman died in the apparently coordinated bomb and grenade attacks.
Officials said 17 other people were wounded in the attacks.
A six-year-old girl was killed and 12 people were hurt in the attacks against a variety of checkpoints, security officers' homes and dismounted patrols, officials said.
An 11-year-old boy was killed and two other youths were also wounded in the city when a mobile phone they had found while playing exploded.
In Samarra, 110km north of the capital, a grenade attack on a federal police checkpoint killed one officer and hurt three others, police there said.
Violence in Iraq is down from its peak in 2006 and 2007 but attacks remain common.
A total of 155 people were killed in violence in December, official figures showed.
