The devastating suicide bombing on a Sufi shrine which killed more than 80 people in southern Pakistan on February 16 is only the latest in an ever-increasing list of attacks on followers of Sufi Islam.
Music, Dancing, And Tolerance -- Pakistan's Embattled Sufi Minority

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A devotee dancing to the beat of the drum at the Lal Shahbaz Qalandar shrine in 2013. The Huffington Post describes Sufism as a branch of Islam which "employs music, dance and spiritual recitation to awaken the God who Sufis say is asleep in the human heart."

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Devotees reach out for sacred water inside the shrine in 2013. Sufism draws on some rituals of pre-Islamic traditions.

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A woman devotee dances in a trance inside the shrine in 2013. Lal Shahbaz Qalandar, the Sufi saint interred here, is revered by both Sufi Muslims and Hindus.

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A devotee's hand is pictured decorated with rings inside the shrine. The annual festival is a spectacular parade of colorful clothing and personal decorations.