It is believed the two hostages are the same man who were killed by the extremist group, infamous for beheading those they have held captive, demanded ransom for in September.
At the time Norwegian Ole Johan Grimsgaard-Ofstad, 48, and Chinese citizen Fan Jinghui, 50, were both pictured wearing yellow jumpsuits with front, side and back profile photos featured on the slick posters that were circulated by the radical group.
Beijing has vowed to bring ISIS to justice after the group said it had executed two hostages, a Chinese and a Norwegian.
ISIS said it had killed the two men, identified as Chinese national Fan Jinghui and Norwegian citizen Ole Johan Grimsgaard-Ofstad in its English-language online magazine “Dabiq.”
President Xi Jinping “strongly condemned” ISIS for the killing of Fan, the first known Chinese national to be killed by the group, and the country’s foreign ministry said the Chinese government would “definitely hold the perpetrators accountable.”
Norway also condemned the killings.