The parents of US hostage Peter Kassig, who is being held by Islamic State militants in Syria, have released a letter he has written in captivity.
In the letter, received in June, he said he was “scared to die” and saddened by the pain his ordeal was causing to the family.
Last week IS posted a video showing the beheading of UK hostage Alan Henning.
It ended with a threat to kill 26-year-old Mr Kassig, a Muslim convert who prefers to be known as Abdul-Rahman.
It was the fourth such video released by the militant group, which controls large swathes of Syria and Iraq.
Previous victims were American reporter James Foley, American-Israeli journalist Steven Sotloff and British aid worker David Haines.
IS said they were killed in retaliation for US-led air strikes on the group’s targets.
‘I pray every day’
The parents – Ed and Paula Kassig – said they had decided to release excerpts from the letter “so the world can understand why we and so many people care for him and admire him”.
In the letter, Abdul-Rahman Kassig wrote: “I am obviously pretty scared to die but the hardest part is not knowing, wondering, hoping, and wondering if I should even hope at all.
“I am very sad that all this has happened and for what all of you back home are going through.
“If I do die, I figure that at least you and I can seek refuge and comfort in knowing that I went out as a result of trying to alleviate suffering and helping those in need.
“In terms of my faith, I pray everyday and I am not angry about my situation in that sense.”
The letter – which the parents received on 2 June – ends with the words: “I love you.”
Mr Kassig’s parents said he had been working for the relief organisation he founded, Special Emergency Response and Assistance (SERA), when he was captured on his way to Deir Ezzor in eastern Syria a year ago.
IS may hold many more hostages.
The group has its roots in al-Qaeda’s Iraqi affiliate but was expelled over its brutal tactics and refusal to obey orders to confine its activities to Iraq.
It has since grown more powerful, and captured large areas of both countries in recent months.