The new release of ISIS's propaganda magazine publishes photos purporting to be bodies of hostages.
The Obama administration on Wednesday is expected to change its hostage policy.
The State Department could not confirm the claim by the terrorist group.
Militants said on Sunday they had beheaded Kenji Goto after international efforts to secure his release failed.
Japanese prime minister Shinzo Abe said every effort was being made to secure the release of Kenji Goto.
The Islamic State have demanded a $200 million ransom for the two Japanese hostages.
The notorious ISIS fighter has seemingly reappeared in the recent video of two Japanese hostages.
Islamic State released a video online purporting to show two Japanese captives, demanding $200 million from Japanese government.
A total $200 million ransom has been demanded for the lives of the two men.
ISIS have said that they have taken the pilot captive
According to local media who claimed to have spoken to hostages, the gunman is calling himself ‘the Brother’
The 26-year-old Indianapolis native was first captured on October 1, 2013 while delivering hospital supplies in Deir Ezzour, Syria.
IS militants kept Kurdish children hostage for six months, forcing them to watch beheading videos, putting them through strict religious instruction and repeated physical abuse
Al-Qaeda commander says that aid worker Abdul Rahman Kassig, formerly known as Peter, had once given him medical treatment
The Islamic State has threatened to next kill American aid worker Abdul-Rahman Kassig, who was working for a medical aid organization when he was taken hostage in October 2013
Foley’s family protested the use of his image in ads by the American Freedom Defense Initiative
After the release of 49 Turkish prisoners, the extent of Islamic State’s kidnapping is revealed – and ignored