Libyan health authorities say an airstrike has hit a civilian area in a southern Tripoli neighborhood, killing at least four children. The Libyan capital has been the scene of fighting since April between the self-styled Libyan National Army and an array of militias allied with the U.N.-supported but weak government which holds Tripoli. The Tripoli-based health ministry says the airstrike took place on Sunday in the al-Sawani neighborhood, about 30 kilometers, or 18 miles, from the city center.