The Nigerian military on Wednesday night rescued 76 schoolgirls and recovered the bodies of two others after they went missing during a Boko Haram attack on a village, Reuters reported.
Earlier it was reported that more than 90 schoolgirls were feared missing after the attack on the village of Dapchi in the northeastern state of Yobe.
Reuters was unable to determine the situation of the remaining missing students.
Anxious parents and guardians converged on the school on Wednesday to demand answers, with conflicting figures as to how many girls were missing.
The Yobe state governor Ibrahim Gaidam said "over 50" remained unaccounted for while the police commissioner of the state said 111 were still missing, according to AFP.
"Eight hundred and fifteen students returned to the school and were visibly seen, out of 926 in the school," said state police commissioner Abdulmaliki Sumonu.
"The rest are missing. No case of abduction has so far been established," he told reporters in the Yobe state capital, Damaturu.
The length of time since the attack and Boko Haram's use of kidnapping as a weapon during its nearly nine-year insurgency has increased fears of another mass abduction.
In 2014, the jihadists abducted 276 girls from their school in Chibok, in neighboring Borno state.
57 escaped in the immediate aftermath and since May last year, 107 have either escaped or been released as part of a government-brokered deal.
In recent years Nigeria has been hit by a wave of terrorist attacks, most of which have been carried out by Boko Haram. Targets have included sports venues and schools teaching a secular curriculum.
Many women and children - including teenage girls - have been taken hostage by the group, which has carried out raids on schools and colleges, seeing them as a symbol of Western culture.
In 2014, Boko Haram pledged allegiance to the Islamic State (ISIS) group.