DHAKA: An explosion has struck a public health college in Nigeria’s second city of Kano, in the north.

Nigeria police say, reports the BBC.

At least seven people were killed in the blast at the Kano School of Hygiene, they add.

The city is known to have 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.

A teacher at the college, speaking to media, said the blast seemed to originate from a car park next to the post-secondary training school.

The latest incident comes less than a week after some 21 people were killed in a bomb blast outside a shop in Yobe state where people had gathered to watch a World Cup match.

Public screenings of the World Cup in some parts of Nigeria have been banned because of threats by Boko Haram, who want to overthrow the government.

BDST: 2146 HRS, JUNE 23, 2014