Five powerful car bombs rocked Baghdad on Tuesday, killing at least 62 people, and wounding 105, many of them students. The blasts shattered a month of calm in the capital ahead of a general election.An interior ministry official said, two car bombs exploded near the labour and interior ministries and a suicide attacker driving a car struck a police patrol in Dora, in southern Baghdad, causing 15 of the deaths.The interior ministry official said 12 of those killed by the suicide attacker in Dora were students at a nearby technical college.However the Baghdad government and the US military have warned of a rise in attacks in the run up to the election, which is expected to take place in February.