Nigerian city of Lagos has been hit by a major explosion

An oil depot in the port area of the Nigerian city of Lagos has been hit by a major explosion and fire, the BBC said.
The blast, which shook buildings in the Apapa area, happened during a transfer of fuel, the National Emergency Management Agency (Nema) said.

Firefighters have been at the scene and four people were wounded in the blast, AFP news agency reports.

Many tankers dock at jetties in the port in Lagos to load and unload petroleum products.