One of the members of the Islamic State (IS) group of kidnappers known as the "Beatles" pleaded guilty on Thursday to complicity in the kidnappings and killings of Western hostages, including four Americans, in federal court in Alexandria , in the USA.
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Alexanda Kotey, a 37-year-old former British national, is notably accused of having participated in the murders of American journalists James Foley and Steven Sotloff, killed in 2014, and that of aid workers Peter Kassig and Kayla Mueller.