(KUNA) -- An interior senior official and five of his assistants were killed as well as 10 others injured Friday in a bomb attack on an interior squad headquarters in Babylon province south of the capital. An interior source at Babylon police told KUNA that insurgents planted explosive devices at the office of Colonel Salam Al-Ma'amouri this morning. The bombing also resulted in serious damage to the headquarters located in Hillah city, added the source. A security barrier was set around the area and the police began to disperse crowds to prevent any other casualties from occurring.Several interior officials mourned the late Colonel and his company and said that the bombing indicates a serious security breach in the Iraqi police. Colonel Al-Ma'amouri was head of the Scorpion squad a special operations unit responsible for protecting Babylon province and areas southern Iraq.