sonia gallegos reports. >> reporter: fires sparked by rockets from rival militias. those living within a three kilometer radius of the depot asked to leave. could be a humanitarian or environmental disaster. this is the latest in a series of battles between groups trying to gain control over the international airport. in this incident a plane was destroyed and more than 20 people were killed. the weeks of violence that have engulfed tripoli have forced petrol stations and government offices to shut. u.s. evacuated its embassy. with f-16 fighter jets flying overhead to neighboring tunisia. diplomatic missions have also left the city. >> translator: this crisis caused security confusion. a lot of foreign embassies left through this airport. >> reporter: the intensified fighting will make the u.s. particularly nervous. the 2012 attack on the eastern city of benghazi killed the ambassador and two others. two years later the capitol has become a battle ground once again. many killed hundreds more injured, many of them civilians. the militia groups behind the fighting are