US President Barack Obama announced that 26-year-old US aid worker Kayla Jean Mueller died during her imprisonment by the Islamic State terrorists.

In a statement, Obama stated that “No matter how long it takes, the US will find and bring to justice the terrorists who are responsible for Kayla’s captivity and death”, while he further described the Islamic State as a “hateful and abhorrent terrorist group”.

It is worth mentioning, that last week members of ISIS claimed the woman was killed during a series of bombings by the Jordanian air force.