People in Nigeria's commercial capital, Lagos, are gearing up for further traffic chaos as the state government plans the temporary closure of one of the city's key routes.

The authorities have announced that the Third Mainland Bridge will shut for three days to carry out maintenance investigations.

The closure is due to start at midnight on Thursday and should end 72 hours later on Sunday night.

The 11.8km (7 miles) bridge is one of the main crossing points in Lagos city, which covers the mainland and a series of islands, is often blighted by traffic jams.

Major repairs are due to start at the end of the year or at the beginning of 2019, but it is not clear how long they will go on for.

The Third Mainland Bridge is the continent's second longest bridge.

The local authorities have produced a map of alternative ways of getting round the city.