The Latest: At least 25 children rescued in Nigeria collapse

LAGOS, Nigeria (AP) - The Latest on Nigeria building collapse (all times local):

5 p.m.

Lagos governor Akinwunmi Ambode says at least 25 children have been rescued after a three-story school building collapsed in Nigeria.

It is not known how many students were in the primary school on the top floor, or how many have died.

The collapse occurred in the heart of Nigeria's commercial capital, setting off frantic rescue efforts.

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4 p.m.

Witnesses say nearly two dozen children have been pulled from a collapsed building in Lagos, Nigeria.

It is not known how many students may have been at a primary school that was located on the top floor of the three-story building.

The school could have had as many as 100 children there at the time of the collapse.

It is not immediately known what caused the structure to collapse, leaving piles of dusty concrete slabs and exposed metal.

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2:25 p.m.

There are cheers as a small child is pulled from the ruins of a collapsed three-story building in Lagos, Nigeria. But the crowd quiets as another child is freed but does not move.

It is not yet clear how many children have been pulled from the rubble, and how many have survived. Scores were thought to be inside when the three-story building containing a school went down.

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1:35 p.m.

Rescue efforts are underway in Nigeria after a three-story building school building collapsed while classes were in session. Scores of children are thought to be inside.

Associated Press video from the scene on Wednesday shows at least one dust-covered child being carried out of the rubble. Onlookers crowd around in the densely populated neighborhood in Lagos, Nigeria's commercial capital.

They cheered as the child was lifted out.

Building collapses are all too common in Nigeria, where new construction often goes up without regulatory oversight.ˆ