At least 20 people have died and many are trapped after a building collapsed in Nigeria's main city of Lagos.
The block of flats caved in on Tuesday evening and rescuers have so far pulled more than 50 people from the wreckage.
 Our nigerian correspondent Yunfeng has more.
Rep: A four-story apartment building collapsed overnight in Nigeria's commercial capital, and Red Cross officials are helping pull bodies and survivors from the rubble.
Heavy lifting equipment arrived at the site to help people using their bare hands to reach those inside.
At least 20 people died so far.
Authorities blamed shoddy construction as the probable cause for the collapse.
More than 100 people are feared to have been in the building when it collapsed.
A red cross worker was quoted as saying that more people could be saved as rescue work progresses.
Distraught relative were in touch with those inside overnight, but the calls had stopped by morning. Rescuers had said they had heard trapped people crying out for help.
One woman was brought out alive on Wednesday morning.
So far 50 people have been recovered alive
Lagos state police said the authorities had launched an investigation into the cause of the collapse. The building is thought to have housed some 180 people in the 36 apartments.
The building in the residential area of Ebute Metta was relatively new - thought to be not more than three years old.
Such collapses in the past have been blamed on substandard construction and flouting of building regulations.
Dozens have died in recent years in Lagos as poorly maintained buildings have collapsed.
In March, one of Lagos' tallest buildings caved in during a heavy thunderstorm in the heart of the commercial district. The building had been sealed off after a fire on the eighth floor.
Yunfeng, CRI news, Lagos, Nigeria
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