Forces of the Turkish-backed Libya's Government of National Accord (GNA) said they launched an offensive Saturday for slain leader Moamer Kadhafi's hometown Sirte, as rival Libyan National Army (LNA) commander Khalifa Haftar backed a ceasefire.
Government of National Accord forces have repulsed a 14-month offensive against the capital Tripoli by eastern-based Haftar and are now poised to drive on eastwards taking advantage of stepped up military support from Turkey.
"The air force has carried out five strikes in the outskirts of Sirte" -- the last major town before the traditional boundary between Libya's western Tripolitania and eastern Cyrenaica regions -- GNA spokesman Mohamad Gnounou said.
"Orders have been given to our forces to begin their advance and to systematically attack all rebel positions," he added.
Sirte was taken by Haftar's forces virtually without a fight in January after one of Libya's myriad local militias switched sides.
Beyond Sirte lies the prize of Libya's main oil export ports, Haftar's most important strategic asset.
Some 450 kilometres (280 miles) east of Tripoli, the town was where Kadhafi put up his last stand against NATO-backed rebel forces in 2011 and nostalgia for his ousted regime remains strong.
- Ceasefire talks -
Haftar's forces have put a brave face on their precipitate fallback from the west, saying that it was a response to mounting international pressure for a lasting ceasefire.
"Heeding appeals from the major powers and the United Nations for a ceasefire... we pulled back 60 kilometres (40 miles) from the Greater Tripoli city limits," the LNA spokesman, Ahmad al-Mesmari, said.
"We have asked friendly countries and the United Nations for guarantees... that the other side and the Turkish invaders refrain from attacking us," he told a news conference late Friday.
Egyptian President Abdel Fattah El-Sisi said after talks with Haftar and other eastern leaders Saturday that they had signed up to a declaration calling for a ceasefire from 6 am (0400 GMT) Monday.
But the GNA forces' spokesman appeared to pour cold water on the Egyptian proposals, which included a demand that militias disband and hand over their weaponry to Haftar's men.
"We didn't start this war, but we will choose the time and place when it ends," Gnounou said.
"Our forces continue to advance with force and resolve, chasing the fleeing (Haftar) militias," he said.
The United Nations' Libya mission said Tuesday that after a three-month suspension, the warring parties had agreed to resume ceasefire talks.
Libya has endured years of violence since the 2011 uprising that toppled and killed Kadhafi, with rival administrations and scores of militias battling for power.
The United Nations has urged outside powers to respect a deal reached at a January conference in Berlin, ending foreign meddling and upholding a much-violated arms embargo.
The GNA is backed by Turkey and its ally Qatar.
*This story was edited by Ahram Online.