American aid worker Kayla Mueller - who was being held by Islamic State - has died, President Barack Obama has confirmed.
Ms Mueller's family said they were "heartbroken" at the news, and released a copy of a letter she had written in captivity.
Confirmation of Mueller's death comes days after Islamic State claimed the 26-year-old had died in a Jordanian air strike.
The childhood best friend of Islamic State hostage Kayla Mueller has made an emotional public statement after the aid worker's death was confirmed by US authorities today.
A tearful Eryn Street said: "I am not yet sure how to live in a world without Kayla, but I do know that we are all living in a better world because of her."
Following confirmation of the US hostage's death, Kayla Mueller's family have released a copy of a letter she wrote in captivity in 2014.
Here is what we know about American aid worker Kayla Mueller who was being held by Islamic State.