BBC News with Marion Marshall

Gunmen in Kenya have seized two foreign aid workers from the Dadaab refugee camp, near the border with Somalia. Police said two Spanish women from the medical charity Medecins Sans Frontieres were abducted. Their Kenyan driver was shot and wounded.

The Dadaab camp is home to hundreds of thousands of Somalis who fled from fighting and famine in their home country. The UN High Commissioner for Refugees, Antonio Guterres, said he hoped the kidnappers would be found quickly.

"It is absolutely intolerable that those that are there to rescue lives became the victims of such a brutal attack. Now Kenya is a sovereign country of course; the Kenyan police is in charge of security in the camp. The Kenyan police acted very quickly today. They immediately responded to the appeal. They mobilised not only the local forces but two helicopters. As a matter of fact that the car has been recovered, but unfortunately the two colleagues have not yet been found."

A court in the United States has sentenced a New York-based financier to 11 years in prison for insider trading, the longest sentence in a generation for such an offence. Raj Rajaratnam had already been found guilty of trading on illegal tips supplied by insiders at some of America's leading companies. Caroline Hepker reports from New York.

Prosecutors calculated that Mr Rajaratnam made up to $75m by trading on illegal tips from a coterie of well-placed insiders.