Casualties were feared after a building housing a school collapsed in Lagos on Wednesday.
Nigerian media reported that students were feared trapped under the debris after the three-story structure crumbled at around 10:20 a.m. local time.
It was not immediately clear what caused the building to collapse.
Rescue work is underway.
Building collapses have occurred frequently in Lagos, Nigeria's economic hub, due to substandard materials used for construction and violations of building laws and regulations.
In 2017, a four-story building suddenly collapsed, killing eight people. In 2016, 34 people were dead as a five-story building collapsed while under construction.
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