Libya's unity forces in battle to retake strategic Sirte

Fighters loyal to Libya's UN-recognised government Sunday kept up their counter-offensive against forces of strongman Khalifa Haftar, but fighting stalled on the outskirts of the strategic city of Sirte.The Mediterranean coastal city -- the home of former dictator Moamer Kadhafi who was ousted and killed in a 2011 NATO-backed uprising -- is also a key gateway to the country's major oil fields in the east, still held by pro-Haftar forces.The Turkish-backed Government of National Accord (GNA) base