‘They threatened to kill my sister and post it on YouTube,’ says brother of abducted Nigerian student as ransom deadline passes

The kidnappers of at least 20 students abducted in Nigeria have threatened to kill the remaining hostages if their ransom demands are not met, the brother of one of the captives has told CNN.The kidnappers of at least 20 students abducted in Nigeria have threatened to kill the remaining hostages if their ransom demands are not met, the brother of one of the captives has told CNN.