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Surge in Arab sectarian violence after uprisings

20 December 2013 Last updated at 13:34 GMT

One of the dominant issues to emerge in three years of Arab uprisings across the Middle East has been the divide between Sunni and Shia Muslims.

Iraq, Bahrain and Lebanon, among other countries, have have witnessed a surge in sectarian-related violence.

Jeremy Bowen reports from Lebanon.

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