BAGHDAD (AFP/Reuters) - A wave of bombs targeting namazis at mosques across Baghdad killed 29 people and wounded more than 136 on Friday a month after US troops withdrew from Iraqs main urban centres. Security officials said the six apparently coordinated blasts occurred outside mosques and prayer centres in and around the capital, including one frequented by followers of Moqtada al-Sadr. The most devastating attack was in the northeastern district of Al-Shaab, where a car bombing killed 23 people and wounded 107 others, an Interior Ministry official said. The mosque itself is occupied by Iraqi special forces, and before the car bomb exploded namazis, many of them loyal to Sadr, were praying between the building itself and the parking lot. Witnesses said namazis had told local police of their suspicions regarding a 1980s Volkswagen Passat, but they were assured the vehicle was safe. The car bomb exploded a short while later, with witnesses saying local police then panicked and began firing their guns randomly, inadvertently killing three of the 23 who died. This is all your fault. We told you about the car, a crowd at the blast site shouted at Iraqi security forces. Others swore and children threw rocks, a Reuters witness said. The site was littered with abandoned slippers. The charred skeleton of a car sat nearby. In the aftermath of the attack, local residents shouted verbal abuse at police, saying officers in the area had not done their job, and later demanded that security forces leave. We lay responsibility with the Iraqi government, because it is supposed to protect Iraqis, Sheikh Salah Obaidi, a spokesman for the Sadrist movement in Najaf, told AFP. The governments intelligence efforts are not up to the mark. Meanwhile, in twin bombings at Al-Rasoul Al-Adham mosque at Diyala bridge, 10km south of Baghdad, five people were killed and 15 wounded as they left after Juma prayers, an Interior Ministry official said. An attack in Zafaraniyah left one dead and six injured, while separate bombings in Kamaliyah and Al-Elam wounded four people each. Fridays violence was the worst to hit Iraq since a double suicide attack in the northern town of Tal Afar on July 9 killed 35 people and wounded 61. Violence has dropped markedly throughout Iraq in recent months, but attacks increased in the run-up to the US military pullback a month ago from urban centres, with 437 Iraqis killed in June - the highest death toll in 11 months. Attacks remain particularly common in Baghdad and the restive northern city of Mosul. On Thursday 11 people were killed in two separate bomb attacks, one against a political partys offices in Baquba, north of Baghdad. The other targeted a police station near the Iraq-Syria border. The same day, a senior US commander warned that security forces would have to be watchful of violence targeting parties and politicians in the run-up to general elections next January. Leading up to the elections, were also going to see some politically motivated violence, Col Tobin Green, commander of the US armys 1st Brigade, 1st Cavalry Division, told reporters in Baghdad. Meanwhile, two people were killed and 12 others wounded by a car bomb in the oil-rich northern Iraqi city of Kirkuk on Friday, police said. The bomb went off at around 8 pm (1700 GMT) in a popular market in a Kurdish neighbourhood of the ethnically mixed city, 255km north of Baghdad. Kirkuk is plagued with tensions among its Kurdish, Turkmen and Arab communities. Many of the Arabs were settled in the province by executed dictator Saddam Husseins regime in a deliberate attempt to dilute its historic Kurdish majority.