ISIL militants claim that US hostage, Kayla Mueller, has been killed during a Jordanian air strike.
The group announced she died in Raqqa, an ISIL stronghold in Syria.
ISIL provided no proof of her demise except pictures of the alleged bombing site.
The White House said it was investigating the claim, but has yet to verify the veracity.
US State Department spokesperson Marie Harf made the following statement: “I will , say that Secretary Kerry and our team and across the US government are putting in every effort behind finding to locate Americans being held overseas.
Every intelligence tool, diplomatic tool. The Secretary has reached out to over four dozen countries about Americans being held overseas writ large to try and bring these people home.”
Kayla, an aid worker from Arizona, was taken hostage in Aleppo, Syria in 2013.