One of ISIS' two Japanese hostages has been killed after a deadline for ransom passed, and the terror group has issued a new demand for the other's freedom -- a prisoner exchange -- a video posted online Saturday by a known ISIS supporter purports to show.

The video appears to show a static image of surviving Japanese hostage Kenji Goto, dressed in orange, holding a photo of what appears to be beheaded compatriot Haruna Yukawa.

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