BAGHDAD (Agencies) A series of bombs targeting Shia areas rocked Baghdad Friday, killing at least 63 people in an apparent backlash after Iraq touted a series of blows against a weakened Al-Qaeda-led insurgency. Seven people were also killed by bombs in the Sunni west of the country, less than a week after Iraqi security forces backed by US troops killed Al-Qaedas top two leaders in Iraq. Thirteen blasts hit different areas of the Iraqi capital around the time of Juma (Friday) prayers, mostly near imambargahs and at a marketplace, an Interior Ministry source said. Three bombs targeted people outside the main office of fiery anti-American cleric Moqtada al-Sadr in the crowded Sadr City slum. Those blasts killed 39 people and wounded 56, generating denunciations of the security forces. Some youths threw stones at an Iraqi army vehicle. The attacks, one of Iraqs deadliest in recent weeks, also wounded around 120 people and signalled the possibility of a rise in violence after a March national election produced no clear winner and left a power vacuum for insurgents to exploit. Targeting prayers in areas with a certain majority, Baghdad security spokesman Maj-Gen Qassim al-Moussawi said, referring to Iraqs Shia majority, is a revenge for the losses suffered by Al-Qaeda. We expect such terrorist acts to continue. Last Sunday, Al-Qaedas leader in Iraq, Abu Ayyub al-Masri, and Abu Omar al-Baghdadi, the purported head of its affiliate, the Islamic State of Iraq, were killed in a raid in a rural area northwest of Baghdad by Iraqi and US forces. A bomb also exploded outside an imambargah in the western neighbourhood of Hurriya, killing eight people, and outside another imambargah to the east of Sadr City, in Al-Amin district, killing 16 others, police said. A bomb by an imambargah in Zafariniyah in southeastern Baghdad killed one person. These are acts of revenge that are intended to send a message to the Iraqi government and the world that Al-Qaedas existence will not be affected by the killing of specific leaders, Iraqi political analyst Hameed Fadhel of Baghdad University claimed. They want to say that they are still here. Several hours earlier, seven members of one family were killed in a series of blasts in Khalidiya, a town in Iraqs turbulent western province of Anbar 83km west of Baghdad. One police officer died trying to defuse a bomb. At four in the morning, I heard a movement behind my house and found some barrels nearby, so I took my family out of the house, said Fadhil Salih, a judge at the Khalidiya courthouse. An hour later the bomb went off and destroyed my house but, thank Allah, there were no casualties in my family, Salih said. At least 10 people were wounded, including two policemen. Authorities imposed a vehicle ban after the blasts.