AN ONLINE video purports to show the Islamic State group threatening to kill two Japanese hostages unless it is paid a $200 million ransom in 72 hours. The video was released online this afternoon. Militant websites affiliated with the Islamic State group posted it. Japanese hostage Haruna Yukawa was captured by #ISIS in summer last year via @ArtWendeley pic.twitter.com/sa9Iq15JSH — Conflict New