He also said the others who are at large could recruit new Boko Haram members or launch suicide bombings and other acts of terror.
Zannah Mustapha, a Nigerian barrister who led the negotiations, told Newsweek that negotiations were ongoing and that the government was seeking to establish a complete "cessation of hostilities" with Boko Haram, which has been beaten back by Nigerian and regional military offensives in recent years.
On Saturday, 82 of the Chibok schoolgirls were released.
(AP Photo/ Sunday Alamba).
A kidnapped Chibok schoolgirl who recently had the chance to be freed chose to remain with her militant fighter husband, it has emerged. "Majority live in villages very far from Chibok, so it will take some time before they can get to Abuja".
Allen Manasseh, Chibok parents' spokesperson, speaks during an interview in Abuja, Nigeria, Tuesday, May 9, 2017.
"The release of the Chibok girls might appear to have been delayed but we take cognizance of the fact that all hopes were lost in the months after their abduction until the coming of President Muhammadu Buhari's administration".
The United Nations welcomes the released of 82 Nigerian Chibok schoolgirls that were kidnapped by the extremist group Boko Haram in 2014, said a spokesperson here on Monday.
Minister of Women Affairs and Social development, Hajia Jummai Alhassan who spoke with newsmen in Abuja on the present state of the recently released 82 girls said negotiations are ongoing to secure the release of the remaining Chibok girls.
Speaking with state house correspondents, Alhassan said: "Any parents that identified their children will be brought next week to see them". The government freed five top Boko Haram commanders in the deal, according to Sen.
The mass abduction of almost 300 schoolgirls from a boarding school three years ago brought world attention to Boko Haram's deadly rampage in northern Nigeria.
Nigeria's government rebuffed criticism by a faction of the former ruling party that it should not have made an exchange for the girls' release, along with other criticism that it waited too long to take such action. "I really want to see my daughter, but I can't come unless with government invitation".
Discussions to free the remaining 113 girls should begin at the end of the week.
The Islamists have killed 15,000 people and displaced more than two million during a seven-year insurgency aimed at carving out an Islamic caliphate in mainly Muslim northeastern Nigeria.
Esther Yakubu, a woman who says one of her daughter is missing waits for news if she is among the girls released in Abuja, Nigeria, Sunday, May.
He also disclosed that most of the girls released were not from Chibok town but villages scattered around the area.
But families remain in Chibok, some 900 kilometers (559 miles) from the capital, Abuja.
"The parents of the Chibokgirls are free to visit them at any time". As The World Weekly went to press, the Chibok girls had yet to be reunited with their parents."We should just be happy that more of the girls have been returned", Dr. Aghedo argues, while stressing that the government "must continue to work towards rescuing the rest and rebuilding safety and stability in the region".