At least 10 people have died and many more are feared trapped after a building containing a school collapsed in the Nigerian city of Lagos.
About 40 pupils had been pulled out alive, the official said.
The building had been identified as “distressed” and listed for demolition, Lagos building officials told the BBC.
The collapse happened at about 10:00 local time (09:00 GMT). There were frantic scenes at the site as rescuers and local men searched for survivors, and family members crowded the area in the hope of finding their loved ones alive.