The latest in the events surrounding the purported slaying by Egypt's Islamic State affiliate of Croatian hostage Tomislav Salopek, after an online image was circulated Wednesday showing his beheaded body.

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2:10 p.m.

France's GCC Ardiseis in Egypt, the subsidiary where Salopek worked as a surveyor, says it has no immediate confirmation of his killing.

A company official, who spoke on condition of anonymity because he was not authorized to speak to reporters, says Salopek was abducted last month on the Oasis Road, west of Cairo.

There has been speculation about where the militants held the Croatian hostage, with some reports focusing on restive Sinai, the base of the IS affiliate.

But an Egyptian security official says the likelihood of that is small since Salopek was snatched near Cairo at a time when Egyptian forces are at their highest readiness in Sinai and the Red Sea area surrounding the recent inauguration of the extension to the Suez Canal.

He says all security agencies have been working on Salopek's case and that they have no way to confirm the killing. He spoke on condition of anonymity in line with regulations.

— Sarah El Deeb in Cairo.