Zana, who claimed that the government refused to listen to him, told CNN that he won't reveal the location of the girls and the dreaded Islamist group.
The Senator made this declaration when he was being interviewed via a telephone call by Isha Sesay of CNN.
Asked where he thinks the insurgents might be keeping the girls, the Senator replied, "I won't tell where they are being kept again because I have told the Federal Government where they are likely being kept before the video was released. Now that I saw the video, the vegetation in the clip confirmed what I have told them earlier," "If they want to know where they are being kept, then the government should remember what I told them before. What I can tell you is that the girls are no longer here in Chibok."
He affirmed that it would be difficult for Nigeria to get back all the girls abducted by the insurgents, saying that the girls have not only been split by their abductors but ferried through Lake Chad to neighbouring countries among which he said were Chad, Niger and Cameroon.
He said, "I have been in constant touch with the security agencies, telling them the developments, the movement of the girls from one place to the other and then the splitting of the girls and eventually the marriage of these girls by the insurgents.
What bothers me most is that whenever I informed them where these girls were, after two to three days, they will be moved from that place to another and still, I will go back and inform them that see, this is what is happening.
"I lost hope two days ago when I found out that some of them were moved to Chad and Cameroon. Actually, some of them were moved through the Mandara Mountain that is in Gwoza and some of them are just a stone throw from their barracks, even now as I am talking to you, some of them are in Kolofata, which is in Cameroon but about 15 kilometres or even less to the borders."