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Iraq saw another round of sectarian violence, with bombs going off simultaneously at Shiite targets across the country. At least 60 people were killed and dozens wounded in one of the deadliest days since U.S. troops withdrew in December. In Baghdad, 10 explosions hit Shiite neighborhoods during rush hour, killing at least 32, and more than a dozen blasts hit cities elsewhere in the country. There has been a string of attacks in Iraq since December, when Shiite Prime Minister Nuri al-Maliki sought to arrest Sunni Vice President Tariq al-Hashimi for alleged assassination plots.