"Fifteen more students were released on Saturday night and 65 students are still with the bandits," John Hayab, local chairman of the Christian Association of Nigeria, was quoted as saying by the newspaper.
In late July, kidnappers had reportedly returned 28 students to their families.
Kidnapping and banditry in Nigeria have become commonplace in recent months. Boko Haram, a militant group linked to the Daesh terrorist organisation (banned in Russia), appears to have intensified its attacks and abductions of schoolchildren in the northern part of the Western African nation.
*Daesh (also known as IS/ISIS/ISIL/Islamic State) is a terrorist group banned in Russia.