A week after demanding the Egyptian government free female Muslim prisoners in exchange for a Croatian hostage, Tomislav Salopek, Sinai Province of the Islamic State (IS) published a photo of his beheaded body.

The photo was distributed on Twitter on August 12, and included a caption charging Croatia with participating in the war on the IS. Sinai Province had released a video of Tomislav on August 5 in which he indicated that he worked for the Cairo branch of the French company CGG, and was kidnapped on July 22, 2015. He gave the group’s demand for his release as: “They want to substitute me for the Muslim womans arrested in Egyptian prisons. These matters have to be achieved before 48 hours from now; if not, the soldiers of Sinai Province will kill me”.