NEW : The casualties include a 7-year-old boy . Three bombings within two-hour in Baghdad wound several , police say . Al-Maliki has said al Qaeda and other terrorists are behind the killings , but he also has blamed political movements and security guards , and he has promised to pursue the attackers . A police officer in ethnically tense Garma is killed Tuesday . four people are slain in southwestern U.S. Sunday .
NEW : The casualties include a 7-year-old boy . Three bombings within two-hour in Baghdad wound several , police say . A police officer in ethnically tense Garma is killed Tuesday . four people are slain in southwestern U.S. Sunday .