The alliance controlling Libya's capital Tripoli said Wednesday it welcomed a draft UN agreement aimed at lifting the country out of months of chaos by forming a national unity government. UN envoy Bernardi** Leon's fourth version of a proposed pact between the Fajr Libya Islamist militia-led alliance and Libya's internationally recognised government contained "positive proposals that could lead to a political solution", the Tripoli administration said in a statement. The UN has tried for months to broker a compromise between warring factions in Libya, which descended into lawlessness after the NATO-backed overthrow of veteran autocrat Moamer Kadhafi in 2011.