The British Prime Minister David Cameron has arrived in the United States at the start of a three-day visit. His talks with President Obama are expected to focus on Nato's role in Afghanistan, the situation in Syria and Iran's nuclear programme. Their meeting takes place amid heightened tension in Afghanistan following last weekend's killing of 16 civilians by an American soldier.
African Union mediators say a breakthrough has been made in talks between Sudan and South Sudan. The two countries have agreed in principle on demarcating their common border. Each country will also accord freedom of movement to citizens of the other state. However, major disagreements on issues, such as oil, remain. James Copnall reports from Khartoum.
The framework agreement initialled by negotiators from both countries provides for what it's called the four freedoms. Citizens of the other state should now have freedom of residence, freedom of movement, freedom to undertake economic activity and freedom to own property. This could be a huge relief to the more than half a million South Sudanese who still live in Sudan. There has been growing concern about them with less than a month to go until the end of a grace period to regularise their status in Sudan. The negotiators have also come to an agreement to demarcate both countries' common border, which will be the longest in Africa.
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A public bus has been attacked by gunmen in Ethiopia, and 19 people were killed. At least eight other passengers were injured in the attack near the town of Bonga in the western Gambella region. The motives of the gunmen are not clear.