An official says assailants have shot dead three officers after attacking a boarding school in northern Nigeria.
Air Commodore Sani Ahmed told journalists Friday that a fourth officer sustained bullet wounds during Thursday night's attack.
The gunmen targeted a school near the northern city of Kano that is run by military officers. The attackers did not enter the hostel housing more than 100 pupils.
Authorities are treating the case as an armed robbery because some items were stolen, Ahmed said without elaborating.
Residents, though, fear it could have been a Boko Haram attack. The feared radical sect is responsible for a series of attacks that have targeted security officers in northern Nigeria.