The Latest on Croatian hostage killed by Islamic State

1The 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.
2The family of a female Islamist prisoner in Egypt, whose freedom was demanded by the Islamic State in return for Salopek's life earlier this month, says they are all in shock over the horrific killing of the Croatian hostage.
3Doaa el-Taweel, sister of photographer and activist Esraa el-Taweel who has been jailed for the last two months, says Esraa had rejected the IS ultimatum and that "the life of an innocent man who is not responsible for ... (Egyptian government) detainees be negotiated."
4In an earlier online video, the Islamic State's affiliate in Egypt set an Aug. 7 deadline for authorities to free "Muslim women," referring to female Islamist prisoners detained in a sweeping government crackdown following the 2013 military ouster of the country's Islamist president.
5Croatia's foreign ministry said Wednesday they could not confirm Salopek's death.
6But the country's prime minister, Zoran Milanovic, will be addressing the nation in couple of hours.
7Croatian President Kolinda Grabar-Kitarovic said in a statement that she is cancelling all her pre-arranged activities on Wednesday.
8France's GCC Ardiseis in Egypt, the subsidiary where Salopek worked as a surveyor, says it has no immediate confirmation of his killing.
9A 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.
10There has been speculation about where the militants held the Croatian hostage, with some reports focusing on restive Sinai, the base of the IS affiliate.
11But 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.
12He says all security agencies have been working on Salopek's case and that they have no way to confirm the killing.
13He spoke on condition of anonymity in line with regulations.
14-Sarah El Deeb in Cairo.