DAKAR (Reuters) - Groups of Islamic State fighters are quitting their bases in Libya fearing Western air strikes and heading south, posing a new threat to countries in Africa's Sahel region including Niger and Chad, officials and intelligence sources said.
The ultra-hardline movement that has seized large areas of Syria and neighbouring Iraq has also amassed thousands of fighters along a coastal strip in Libya, where it has taken the city of Sirte and attacked oil infrastructure.
