NEW : The dead include a year - old boy . Two bombings within two hours in Baghdad wound several , police say . A police officer in ethnically tense Kirkuk is killed Tuesday . Three people are killed in southwestern Baghdad Tuesday .
NEW : The casualties include a 7-year-old boy . Three bombings within two hours in Baghdad wound several , police say . A police officer in ethnically tense Kirkuk is killed Tuesday . Three people are slain in southwestern Baghdad Tuesday .