Kano - At least eight people were killed and 20 wounded by an explosion at a college campus in Kano during school hours on Monday, police said.
It was not immediately clear if militants were behind the explosion
The blast at the Kano State School of Hygiene tore through an area just inside the college's main gate, a popular spot where students often gather at food kiosks between classes.
Police took one suspect in for questioning, state police commissioner Adenrele Shinaba told reporters. The blast was so severe that several cars parked nearby were badly damaged, he said.
Witnesses said the blast caused people working in central Kano to flee the city centre.