ISIS-linked Egyptian Muslim terrorist group, Ansar Beit al-Maqdis, has claimed responsibility for the August killing of American oil worker William Henderson. The Ansar Beit al-Maqdis organization, which now goes by the name Wilayat Sinai, said on its Twitter account that it carried out Henderson’s killing and published photos of his passport and identification cards.
In the obituary Henderson’s death was listed as “sudden.” But the family had no idea how he died until now.
NBC Henderson was employed by the Houston-based Apache Corporation, which operates a joint venture with the Egyptian General Petroleum Corporation in Karama, southwest of Cairo. A longtime employee, Henderson worked with production operations at Apache, said a spokesperson for the corporation to the Associated Press back in August. A LinkedIn profile appearing to belong to Henderson specifies that he worked as a district manager for Apache in Karama.
Images of Texas native William Henderson’s passport and work ID badges were posted on an official ISIS Web forum on Sunday. Ansar Beit al-Maqdis claimed responsibility for his death, according to global security firm and NBC News counterterrorism consultant Flashpoint Intelligence. His August 6 death had previously been described as the result of a carjacking.
Henderson, 58, worked for Houston-based Apache Corp. for 28 years. His obituary said he “passed suddenly while working in Karama, Egypt, on August 6.” In a statement released early Monday, Apache said that the “tragic carjacking incident this past August involving our colleague Bill Henderson is still under investigation by the U.S. government. Our thoughts and prayers remain with the Henderson family.”
The State Department was not immediately available for comment.
Ansar Beit al-Maqdis recently pledged allegiance to ISIS after emerging in the wake of the Egyptian uprisings in 2011. It now refers to itself as “The Islamic State in Sinai” and has claimed responsibility for numerous terror attacks and assassination attempts in Egypt and on Israel. In August 2012, the group claimed responsibility for a rocket attack on the Israeli seaside city of Eilat and a month later an attack on an Israeli border patrol that killed one soldier and injured another, according to the State Department.
In January of 2014, the group’s fighters downed a military helicopter, killing five soldiers on board, and claimed responsibility for a series of car bomb and grenade attacks in Cairo. In February, Ansar Beit al-Maqdis also bombed a tour bus in the Sinai Peninsula. Last month, the group pledged allegiance to ISIS.
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