Video: Blasts hit southern Nigeria It was around 11pm, we just heard it because we were at home then. We heard some shouts and then the sound "boom" and thought it is just ordinary motor tyre. So then somebody called us who said, "You should come to the market." So we come to market and all of our shops were scattered. So some people thought it was Boko Haram sect, but nobody can identify what happened," witness, Nanamani Sunday said. "We just heard "boom." The blast happened late in the night right under my mother's store," witness, Grace Bowei, said. In Kano, seven people were killed on Friday after coordinated bomb attacks on security forces that were claimed by the Boko Haram. The attacks prompted the government to announce a dusk-to-dawn curfew in the city of more than 10 million people.