Bashir Manzo told CNN that his daughter Fatima was among at least 104 schoolgirls unaccounted for after the raid on the Government Girls Science Technical College in Dapchi, Yobe.
Nigeria's government has yet to release an official list of those missing and government agencies have given contradictory information.
Shortly after the attack, the Yobe governor's office said 50 girls were unaccounted for.
However, Manzo -- the newly elected head of the parents' association at the school -- said that according to parents and the association's records 104 girls were missing.
The group's secretary, Kachalla Bukar, told CNN that his 14-year-old daughter was also missing.
Nigerian President Muhammadu Buhari has promised the families of the missing girls that they'll be found and their attackers brought to justice.
Buhari called the situation a "national disaster" and said more troops and surveillance aircraft had been deployed to search the entire territory for the unknown number of missing students.
"We are sorry that it happened; we share your pain. Let me assure that our gallant armed forces will locate and safely return all the missing girls," Buhari said in a Twitter statement.
The local Yobe government released a statement Wednesday announcing the girls had been found, but later apologized for the "erroneous" statement that it said was based on inaccurate information.
Witnesses told CNN that terrified residents of the town fled on Monday when they saw trucks and motorcycles carrying armed men shooting at people randomly.
Founded by Mohammed Yusuf in 2002, Buku Haram Terrorist group , has killed tens of thousands and displaced 2.3 million from their homes ,Since the current insurgency started in 2009.
