US believes that southwest Libya is now attracting fighters from al Qaeda who fled from Mali

"... The militants' movements highlight what one senior European defense official called a "wake-up call" for the West: While Mali has stabilized, French and U.S. intelligence reports now show militants from Mali have been able to cross the region's porous borders and establish a tentative new base in southwest Libya."It's a concern that squeezing a balloon on one end will create a pocket of terrorists on the other," a senior U.S. official said of al Qaeda and its allies in that part of Africa.
The U.S. believes that the southwest corner of Libya is now attracting Islamist fighters from Ansar al Dine and al Qaeda in the Islamic Maghreb who fled from Mali. In Libya, these groups are blending with local militant groups, including members of Ansar al Sharia, which the U.S. implicated in the 2012 attacks on U.S. outposts in Benghazi, in eastern Libya...."