This grab taken from video, made available by Aamaq news agency of the Islamic State group, shows five men sitting on a hill against the backdrop of a black-and-white IS flag and declaring allegiance to IS leader Abu Bakr al-Baghdadi. The Islamic State group on Tuesday July 31, 2018 claimed responsibility for a car-and-knife attack on Western tourists cycling in Tajikistan that killed two Americans and two Europeans. (Photo by Aamaq news agency of the Islamic State group via AP Photo)
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