Nigeria is frequently hit by building collapses, with weak enforcement of regulations and poor construction materials often used. In 2016, more than 100 people were killed when a church came down in southeastern Nigeria. In Lagos that same year, a five-storey building still under construction collapsed, killing at least 30 people.
A floating school built to withstand storms and floods was also brought down in Lagos in 2016, though nobody was reported injured. (Reporting by Nneka Chile in Lagos; Additional reporting by Paul Carsten and Camillus Eboh in Abuja; Editing by Catherine Evans)