Explosive kills school children in north-east Nigeria

At least six people, some of them school children, have been killed in north-east Nigeria by an explosive device which they had mistaken for scrap metal.

Police and local officials in Borno state said the blast occurred in a building at an Islamic school on Saturday.

Reports say pupils often collect and sell the metal to local communities.

Despite a ban on the practice, scavenging for scrap is still common in the area, which is plagued by Islamist violence.