President Goodluck Jonathan has vowed to investigate the cause of a building collapse, which has left at least 86 dead.
Nigeria's GDP recalculation due on Sunday is likely to pip it ahead of SA as Africa's largest economy, and could alter perceptions of the continent.
A gold mine has collapsed in central Ghana, killing 17 people who were working illegally and had been told to leave, say police and an official.
An explosion and fire hit a barge at Nigeria's main seaport in Lagos, shaking buildings in the area and wounding at least four people, officials said.
Thousands of mourners including African leaders, dignitaries and Ghanaian citizens have attended the funeral of president John Atta Mills.
Nigerian oil workers have threatened to halt production as a strike over fuel prices enters its fourth day and secterian tensions simmer.
Families are searching the rubble from a bomb blast at UN headquarters in Nigeria for loved ones.
Nigeria marked 15 years since the execution of activist Ken Saro-Wiwa and his campaign against the oil industry drew the world's attention to abuses.
It only became worse for Joseph Udoh after his home caught fire -- and his struggles illustrate the stress many Nigerians live through 50 years after independence, despite the country's oil wealth.
The death of Nigeria's president Umaru Yar'Adua jeopardises long-awaited reforms of the nation's decrepit and corruption-ridden oil sector.