The Sokoto state government has shut down Government Girls College, Mabera, following a cholera outbreak.
Kulu Haruna, the state commissioner for science and technology, said the move was in order to curtail the spread of the disease and address the situation.
Thirty students were said to have been infected with a strange disease, which has now been confirmed to be cholera.
Haruna, however, said the number of students infected has increased to 70.
She added that only 20 students are currently at the isolation centre, as the others have been treated and discharged.
She said the 20 isolated students will remain in the school until they are stabilised.
The commissioner, however, refuted claims that the school operated under unhygienic conditions, and added that more health workers have been deployed to address the situation.
She also explained that no teacher has been infected.
There are unverified claims that two students died of the disease.