discipline
among the security forces.
The Sudanese President Omar al-Bashir has warned that oil revenue disputes with South Sudan might lead to war. In an interview with state television, he accused the South of shutting down oil production to force the collapse of the Sudanese government.
"If we are forced to go to war, we will go to war. Relations have reached a state of tension, and they are now closer to war than to peace."
On Sunday, South Sudan said it had completely shut down production because of a dispute over the transit fees it must pay its northern neighbour in order to use the pipeline through which it exports all of its oil.
Freezing Arctic weather in Europe has led to a shortage of Russian fuel supplies in several countries. The Ukrainian energy minister said Russia's Gazprom had reduced gas supplies to Europe through his country by 14%. Here's Anna Borzello.
It's not the first time Ukraine accused Russia of reducing gas supplies to Europe, but now the Europe Union has confirmed that supplies have indeed been reduced to cope with increased domestic demand in Russia due to the severe weather conditions there. The EU energy spokeswoman Marlene Holzner said there had been a decrease in gas deliveries to eight countries - including Austria, Hungary, Bulgaria, Greece and Italy. She said the situation was not yet an emergency as the countries concerned had storage facilities and some could replace supplies with