A bomb attack Wednesday at the Federal College of Education in Kontangora, Niger State, killed only the female suicide bomber who carried out the attack, Governor Babangida Aliyu of Niger State, has said.
Witnesses had disputed details provided by the police that there were no deaths beyond the woman who blew herself up at the college.
One witness said at least one youth was killed in addition to the attacker.
Mr. Aliyu condemned the blast and urged the people of Kontagora and other parts of the state to remain calm, adding that a full scale investigation has commenced into the incident, a statement by his press secretary, Israel Ebije, said.
Mr. Aliyu called on the people of the state to keep vigil against strange faces in their communities.
He added that the government had already doubled security in all the schools and set up teams to ensure continuous screening of people in school environments to prevent evil perpetrators from infiltrating.
The governor said that the students affected by the blast were receiving treatment for injuries and would soon be discharged.
Niger State lies west of Abuja, the Nigerian capital.