NEW : Six of at least 27 people killed are civilians , police say . NEW : The building located in western Baghdad had an ice cream parlor and medical center . They estimated the device contained about two kilograms of highly explosive material . A bomb was hidden in a plastic bag and detonated around 3 pm local time . There have been several protests ahead of Saturday 's provincial elections .
NEW : Six of at least 27 people killed are civilians , police say . NEW : The building located in western Baghdad had an ice cream parlor and medical center . A bomb was hidden in a plastic bag and detonated around 3 pm local time . There have been several protests ahead of Saturday 's provincial elections .