We are extremely concerned about the welfare of those being held and urgently call upon whoever is holding them captive to release them unconditionally.

我们非常关切那些被关押人的安宁，迫切地呼吁那些俘虏他们的人无条件地释放他们。

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The U.S. government has offered little information except to say it's trying to insure the safe return of the hostages, and it has no information on who might be holding them captive.

NPR: Waiting for News on Five Westerners Held in Iraq