Anger as Khartoum pays South Sudan's oil revenues in local currency

The authorities in South Sudan say the central authorities in Khartoum have stopped paying their share of oil revenues in foreign hard currency such as dollars, and instead switched to the local Sudanese pound.

They say that the action is having a significant impact on the south's economy, which needs foreign exchange to buy the imports on which it depends.

BBC Focus on Africa's Peter Martell explained the row.