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IS threatens to kill Japanese hostage within 24 hours

28 January 2015 Last updated at 03:32 GMT

Islamic State are threatening to kill two more hostages, unless Jordan frees an Iraqi woman held there and sentenced to death after being accused of involvement in hotel bombings in Oman in 2005.

In the footage a voice believed to be Mr Goto says he and a Jordanian pilot will be killed unless Jordan frees the Iraqi woman.

The BBC's Rupert Wingfield-Hayes has more.