American hostage Steven Sotloff has reportedly been executed by jihadist terrorists. There was no immediate confirmation of the video.
Sotloff, 31, disappeared while reporting in Syria in August 2013. His apparent kidnap was not widely reported until he appeared on a video released last month by the Isil.
In the footage a masked militant beheads US reporter James Foley then parades Mr Sotloff, warning he will meet the same fate unless US President Barack Obama ends air strikes against the group in Iraq.