A Nigerian emergency official says eight people are dead in a collapsed school building and 37 people have been rescued alive.
The statement by National Emergency Management Agency spokesman Ibrahim Farinloye does not say how many of the dead or rescued are children.
Witnesses have said up to 100 children could have been in the primary school when the three-story building in Lagos collapsed.
Rescue efforts are expected to continue into the night as hundreds of anxious people watch an excavator work under floodlights.