The UN envoy to Libya, Abdul Elah al-Khatib, had met opposition leaders in Benghazi before flying to Tripoli.
Meanwhile, the Libyan regime, which had offered an unconditional ceasefire a month ago, with senior members indicating that Colonel Gaddafi would be eased out, appears to have hardened its position, with officials maintaining that Nato bombing must stop before any talks can be held and demanding the release of Libyan assets frozen by the international community.
It remains unclear how a peace deal would be policed. Nato countries are adamant that they do not want to put boots on the ground, while Alain Le Roy, the UN's head of peacekeeping operations, has stated that the organisation only has limited manpower. The rebel administration is wary of involving African Union forces, holding that many of the governments of member states were clients of the Gaddafi regime.