Some militias patrol in the terminal of Tripoli International Airport, in Libya, on July 17, 2014. Intense fighting has been going on in Tripoli since early Sunday when Islamist armed groups launched attacks on Tripoli International Airport and some key road intersections. Medical sources said the fighting so far has killed nearly 30 people and injured over 40. (Xinhua/Hamza Turkia)

The picture taken on July 17, 2014 shows the damaged roof in Tripoli International Airport, in Libya. Intense fighting has been going on in Tripoli since early Sunday when Islamist armed groups launched attacks on Tripoli International Airport and some key road intersections. Medical sources said the fighting so far has killed nearly 30 people and injured over 40. (Xinhua/Hamza Turkia)

Photo taken on July 17, 2014 shows debris scattered in the main lobby of Tripoli International Airport, in Libya. Intense fighting has been going on in Tripoli since early Sunday when Islamist armed groups launched attacks on Tripoli International Airport and some key road intersections. Medical sources said the fighting so far has killed nearly 30 people and injured over 40. (Xinhua/Hamza Turkia)

A truck belonged to militias parks at the main gate of Tripoli International Airport, in Libya, on July 17, 2014. Intense fighting has been going on in Tripoli since early Sunday when Islamist armed groups launched attacks on Tripoli International Airport and some key road intersections. Medical sources said the fighting so far has killed nearly 30 people and injured over 40. (Xinhua/Hamza Turkia)

The picture taken on July 17, 2014 shows debris scattered in the main lobby of Tripoli International Airport, in Libya. Intense fighting has been going on in Tripoli since early Sunday when Islamist armed groups launched attacks on Tripoli International Airport and some key road intersections. Medical sources said the fighting so far has killed nearly 30 people and injured over 40. (Xinhua/Hamza Turkia)