Forces answering to Libyan strongman Khalifa Haftar battled units that back Tripoli’s unity government on the edge of the capital Friday, days into a new round of conflict that has killed dozens and displaced thousands. Gunfire and blasts rang out and smoke rose as forces backing the fragile UN-backed government of Fayez al-Sarraj attempted to block an offensive by Haftar’s self-styled Libyan National Army (LNA). Dozens of people have been killed and more than 300 wounded over the last eight days, the World Health Organization said on Friday.