No-one immediately claimed responsibility for this morning’s attack, but national police spokesman Emmanuel Ojukwu said he believed Boko Haram were behind the blast, CNN reported.

The Boko Haram group has waged a lengthy campaign in northern Nigeria in their attempt to carve out an Islamist state, and has targeted schools, kidnapped students and killed thousands.

Boko Haram’s name means “western education is sinful” in the local Hausa language.