Eastern forces and troops loyal to the Tripoli government fought on the outskirts of Libya's capital on Wednesday as thousands of residents fled from the battle. The Libyan National Army (LNA) forces of eastern commander Khalifa Haftar held positions in the suburbs about 11 km (7 miles) south of the center, with steel containers and pickups with mounted machine-guns blocking their way into the city. Residents reported LNA planes buzzing Tripoli and the sound of clashes in outskirts. Haftar's forces were engaging Prime Minister Fayez Al-Serraj's fighters at the former international airport, one soldier told Reuters. The United Nations said at least 4,500 Tripoli residents had been displaced, most moving away from their homes in conflict areas to safer districts of the city. Many more were trapped, it said. The LNA forces moved out of their stronghold in east Libya to take the sparsely-populated but oil-rich south earlier this year, before heading a week ago towards Tripoli, where the internationally-recognized government of sits. Libya has been split into rival eastern and western administrations since the 2011 topping of former strongman Muammar Gaddafi. He ruled for more than four decades before falling in a Western-backed revolt. Since then, political and armed factions have vied for power and control of Libya's oil wealth, and the country split into rival eastern and western administrations linked to shifting military alliances after a battle for Tripoli in 2014. The United Nations wants to bring both sides together to plan an election and way out of the chaos. Its humanitarian agency the OCHA said it was extremely concerned about the "disproportionate and indiscriminate use" of explosive weapons in densely-populated areas. Half a million children were at risk, it added. — Reuters