The kidnappers of the US journalist Jill Carroll in Iraq have threatened to kill her in the next two weeks if their demands are not met. Kuwait's Al-Rai television says the captors have set a final deadline of February 26. Ms Carroll is being held by a group calling itself the Brigades of Vengeance, which has called for the freeing of all female prisoners from Iraqi jails as a condition for her release. She was abducted on January 7 in Baghdad by armed men who shot dead her interpreter.