The parents of an American being held captive by Islamic State (IS) militants have released new portions of a letter sent by their son from captivity.
The letter from Abdul-Rahman Kassig, formerly known as Peter, was received by Ed and Paula Kassig earlier this year.
In it, Mr Kassig, who was captured on 1 October 2013 while on a humanitarian mission in Syria, described "incredible" fear but attempted to reassure his parents that he is "coping as best I can".
He wrote: "It is still really hard to believe all of this is really happening... as I am sure you know by now, things have been getting pretty intense.
"We have been held together, us foreigners ... and now about half the people have gone home. ...
"I hope that this all has a happy ending but it may very well be coming down to the wire here, and if in fact that is the case then I figured it was time to say a few things that need saying before I have to go."
Mr Kassig goes on to thank his parents for "everything both of you have done for me".
"Secondly, I want you to know about things here and what I've been through straight from me so you don't have to wonder, guess, or imagine (often this is worse than the reality).
"All in all I am alright. Physically I am pretty underweight but I'm not starved, & I have no physical injuries, I'm a tough kid and still young so that helps.
"Mentally I am pretty sure this is the hardest thing a man can go through, the stress and fear are incredible but I am coping as best I can.