The Islamic State in Iraq and Syria said Friday that Jordanian airstrikes killed a U.S. hostage being held by the militant group.
In a message published by the SITE Intelligence Group, which monitors jihadi groups, ISIS said that the captive had been killed while in a building that was hit by the strikes.
“The failed Jordanian aircraft killed an American female hostage,” the group said in its message, before saying that no ISIS fighters were killed.
A U.S. official said the government was aware of the claims.
“We are obviously deeply concerned by these reports," National Security Council spokeswoman Bernadette Meehan said in a statement. "We have not at this time seen any evidence that corroborates ISIL’s claim.”
A U.S. woman has been held by ISIS since August 2013 when she was captured during a humanitarian mission. Unlike others imprisoned by the group, her name has not been released, at the request of her family. ISIS had previously requested a ransom for her return.