(CNN) -- The video clip lasts a mere 35 seconds. It's night. Six men, illuminated by a flashlight, are sitting with their hands tied behind their backs and with various types of blindfolds.
More men huddle behind them in the dark. In front of them is a pit, apparently freshly dug, and on the other side of the pit sits another man similarly bound and blindfolded.
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Two seconds into the clip, someone says, "Jahiz?" "Ready?"