Violence mars Ashura celebrations in Iraq

Shiite Muslims run between the Imam Hussein (background) and Imam Abbas shrines as part of the ritual ceremony of Ashura in Karbala, 80 km (50 miles) southwest of Baghdad, during the commemoration of Ashura, on November 14, 2013. Millions of pilgrims pour into the Iraqi shrine city of Karbala for the peak of commemorations for Ashura today, the most important day in the Shiite calendar, with security tight following mass-casualty attacks in previous years. AFP PHOTO/ALI AL-SAADIALI AL-SAADI/AFP/Getty Images
Shiite Muslims run between the Imam Hussein (background) and Imam Abbas shrines as part of the ritual ceremony of Ashura in Karbala, 80 km (50 miles) southwest of Baghdad, during the commemoration of Ashura, on November 14, 2013. Millions of pilgrims pour into the Iraqi shrine city of Karbala for the peak of commemorations for Ashura today, the most important day in the Shiite calendar, with security tight following mass-casualty attacks in previous years. AFP PHOTO/ALI AL-SAADIALI AL-SAADI/AFP/Getty Images

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    Violence mars Ashura celebrations in Iraq

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Dozens were killed in Iraq during one of the most holy days for Shiite Muslims. CNN's Mohammed Jamjoom reports.