Police say that the kidnappers set up roadblocks and stopped the vehicles near Al-Tarmiyah, about 30 kilometers north of Baghdad.
Police say it appears that the kidnapped are mostly Shi'a.
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SUNNI, SHI'A: Iraq is riven along sectarian lines, faults that frequently produce violent clashes and are a constant source of tension. Sectarian concerns drive much of Iraqi politics and are the main threat to the country's fragile security environment.