The explosion in the Abuja shopping district is the third bomb blast in as many months.
No one has yet claimed responsibility for the blast.
More top news
A man who was paralysed in a cycling accident can now move his right arm and hand thanks to thought-controlled technology.
Square, the payment service which enables small businesses to take card and contactless payments, has launched in the UK.
The bodies of two UN experts and an interpreter have been found in the Democratic Republic of the Congo, two weeks after they disappeared.