叙利亚联合国观察员爆炸

An injured Syrian army soldier, left, walks next to his comrade after a roadside bomb hit their military truck.

Syrian army soldiers are seen through a damaged military truck window which was attacked by a roadside bomb, in Daraa city, southern Syria, on May 9, 2012.

An injured Syrian army soldier, who was hurt when a roadside bomb hit his military truck, covers his wound with a bandage as he is helped by his comrade to a hospital.

A Syrian army soldier secures the scene as he stands next to a military truck which was attacked by a roadside bomb.

A vehicle for the U.N. observers is offloaded from a plane at the Damascus airport in Syria, May, 8, 2012.

A Syrian airport worker carries a box with equipment for the U.N. observers at the Damascus airport.