The International Committee of the Red Cross, the agency that received the three freed University of Maiduguri lecturers and the 10 women from the Boko Haram terrorists, says there are many people being held against their will.
The ICRC stated this in a release by its Communications Coordinator, Aleksandra Matijevic.
The agency also said it did not interfere in the negotiations between Boko Haram and the Federal Government for the release of the 13 persons.
The ICRC said its only role was to receive the victims from the armed group.
The ICRC Africa Region, Deputy Director, Patrick Youssef, said the agency hoped that more people would be released.
Meanwhile, troops of the Nigerian Army have killed scores of Boko Haram terrorists in Goniri community in the Gujba Local Government Area of Yobe State.
Terrorists had attempted to infiltrate the military’s camp and had opened fire, but the troops responded, leading to the killings.
Two soldiers were reportedly injured during the encounter.