The picture taken on July 21, 2014 shows the wreckage of a plane at Tripoli International Airport, Libya. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

Some staff of Libya's Transport Ministry check the wreckage of a plane in Tripoli International Airport, Libya, on July 21, 2014. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

The picture taken on July 21, 2014 shows the wreckage of a plane at Tripoli International Airport, Libya. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

The picture taken on July 21, 2014 shows the wreckage of a plane at Tripoli International Airport, Libya. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

Libya's Minister of Transport Abdul Qader Mohammed Ahmed Al-Ayib(3rd R) checks the damaged tarmac at Tripoli International Airport, Libya, on July 21, 2014. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

The picture taken on July 21, 2014 shows the wreckage of a plane at Tripoli International Airport, Libya. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

The picture taken on July 21, 2014 shows a rocket propelled grenade hit into the tarmac of Tripoli International Airport, Libya. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

Libya's Minister of Transport Abdul Qader Mohammed Ahmed Al-Ayib(L) shakes hand with a guard at Tripoli International Airport, Libya, on July 21, 2014. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

Libya's Minister of Transport Abdul Qader Mohammed Ahmed Al-Ayib(R) points to the damaged plane at Tripoli International Airport, Libya, on July 21, 2014. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)

Libya's Minister of Transport Abdul Qader Mohammed Ahmed Al-Ayib takes a interview at Tripoli International Airport, Libya, on July 21, 2014. The airport has been under constant attack by Islamist fighters since July 13 with the death toll reaching 47. (Xinhua/Hamza Turkia)