An explosion has struck a public health college in Nigeria’s second city of Kano, in the north, killing at least eight people, police say.
At least 20 others were wounded in the blast at the Kano School of Hygiene.
The city has been targeted in the past by the radical Islamist group Boko Haram, which aims to create an Islamic state in northern Nigeria.
Three states to the east of Kano are under a government-imposed emergency after years of militant attacks.