Blasts targeting police officers plagued Baghdad Wednesday, leaving 12 dead and more than 20 wounded, Iraqi officials said. The country’s police force is the weakest branch of security forces, The Associated Press says, and brings into sharp relief concerns for long-term stability. At least four separate suicide bombers detonated cars in various neighborhoods of the Iraqi capital. “The scene was horrific,” one onlooker said, describing a scene of “burned bodies and charred cars.” The bombing in the neighborhood of Hurriyah was unusual, as it is in a tightly restricted area, home to a prominent Shiite cleric. While no terrorist group has yet claimed responsibility for the attacks, al-Qaida typically carries out attacks like these once a month, Al Jazeera says.