hree car bombs have hit the centre of the Iraqi capital, Baghdad, in quick succession, killing at least 30 people. The attacks, which injured more than 200 others, appear to have been aimed at foreign embassies. The bombings shatter a period of relative calm after last month's parliamentary elections. No-one has said they organised the attacks. The BBC's Jim Muir in Baghdad says the insurgents want to send a message that Iraq remains very unstable and unsafe. On Saturday, gunmen killed 25 people believed to be linked to Sunni militias opposing al-Qaeda in a village south of Baghdad. Gunshots Sunday's explosions went off within a few minutes of each other, shaking the whole of central Baghdad and sending plumes of smoke into the sky."I saw children screaming while their mothers held their hands or clutched them to their chest," one man told the Associated Press news agency. "Cars were crashing into each other in streets, trying to find a way to flee." One bomb struck very near the Iranian embassy, shattering windows throughout the area. The Egyptian, Syrian and German missions, in the Mansour district, were also affected. Another bomb struck near the offices of a leading pro-Iranian political figure, Ahmed Chalabi. Gunshots were heard as emergency services rushed to the scene. A spokesman for the political group headed by Mr Chalabi, the Iraqi National Congress, said that its headquarters close to the Syrian embassy had been targeted by a suicide car bomber, and that many of its guards and employees were among the casualties. casualties. The authorities in Baghdad say security forces shot and killed a man before he could detonate a fourth car bomb near the former Germany embassy, which is now a bank. A number of Iraqi guards working for foreign missions were among those killed. Egypt said several of its staff were wounded by shrapnel. Spain said its embassy and the adjacent German mission were also damaged. Our correspondent says Sunday's attacks bore all the hallmarks of earlier bombings, for which the Islamic State in Iraq - the umbrella group for militant Sunni Islamist insurgents - took responsibility. But the same organisation vowed to disrupt the general elections in March, which went ahead undeterred. This was also the first wave of co-ordinated attacks in Baghdad for more than two months, and the magnitude of each explosion was considerably less than the massive bombs that struck government targets last year, our correspondent says. Those attacks - last August, October and December - killed hundreds of people.