A bomb blast at a public health college in Nigeria's second city of Kano has killed at least eight people, in the latest violence to hit an area repeatedly attacked by Boko Haram.
Body parts, burnt-out vehicles and pools of blood were visible at the site on the grounds of the School of Hygiene, which lies near the heart of the ancient northern city, witnesses said of the Monday attack.
It was not yet clear who carried out the atrocity but initial suspicion fell on Boko Haram, the Islamist extremists who have bombed many educational targets during a five-year uprising.
"So far 20 were taken to hospital and of that eight have been confirmed dead," Kano state police chief Aderele Shinaba told journalists at the scene.
A man believed to have planted the bomb, which went off at around 1pm, has been arrested and his car impounded, according to Shinaba.
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The explosion came from a parking lot near the office of the school's provost, and while there were no classes on campus because of a term break, new students were reportedly on the grounds for registration.
Access to the area was being tightly restricted by the military who had deployed in large numbers around the college, causing massive traffic build-up in the congested city.
Attacks blamed on Boko Haram were once a near-daily occurrence in Kano but the security services have had some success in containing the violence in recent months.
Much of the conflict has shifted to Nigeria's remote northeast, including the April 14 mass abduction by the insurgents of more than 200 schoolgirls from the town of Chibok.
