A new audio message purportedly from hostage Kenji Goto on Thursday morning declared that Jordan must present female prisoner Sajida al-Rishawi at the Turkish border by sunset on Thursday, or Jordanian air force pilot Mu’ath al-Kaseasbeh would be executed immediately.

Twitter accounts linked to the Islamic State group posted the recording, accompanied by Arabic subtitles, on Thursday morning.

"I'm Kenji Goto Jogo," the speaker said in English. "This is a voice message I've been told to send to you. If Sajida al-Rishawi is not ready for exchange for my life at the Turkish border by Thursday sunset, 29th of January, Mosul time, the Jordanian pilot Mu'ath al-Kaseasbeh will be killed immediately."