Unidentified gunmen have attacked a secondary school in Nigeria's Niger state and abducted many students, the state governor's spokeswoman says.
The attackers stormed the Government Science college in Kagara district around 2am on Wednesday, overwhelming the school's security detail, local residents said.
The spokeswoman said a mass abduction of students had occurred, without specifying how many had been taken.
It was not immediately clear who had taken them. While the militant Islamist group Boko Haram and a branch of Islamic State are active in northern Nigeria, kidnappings by other armed groups - mostly for ransom - are also common.
About 100 of more than 270 schoolgirls abducted by Boko Haram from the town of Chibok in 2014 remain in captivity.