East Libyan commander Khalifa Haftar ordered his troops on Thursday to march on the capital Tripoli, the base of the internationally recognized government.
Seeking to encircle the capital, Haftar’s forces approached from south and west, seizing one town south of the city before stopping for the night some 60 km (37 miles) south of Tripoli, eastern officials said.
Armed groups from the coastal city of Misrata, who oppose Haftar, moved to Tripoli to defend it, residents said.
Haftar, who commands the Libya National Army (LNA) from its eastern base of Benghazi, earlier took over the town of Gharyan, 100km south of Tripoli, following brief skirmishes with forces allied to Tripoli-based Prime Minister Fayez al-Serraj.
The offensive is a dramatic escalation in the years-long power struggle in Libya, which has dragged on since the NATO-backed overthrow of Muammar Gaddafi in 2011.
The UN-backed government in the west and Haftar’s parallel administration in the east have been embroiled in conflict for years.
In 2014 Haftar assembled former Gaddafi soldiers and in a three-year battle seized the main eastern city of Benghazi.
This year Haftar took the south with its oilfields, however the capital of Tripoli remains the ultimate prize.
The offensive surprised the United Nations, whose Secretary-General Antonio Guterres flew on Wednesday to Tripoli to help organize a reconciliation national conference.
Asked about the offensive, Guterres said Libya needed a political, not a military, solution. His Libya envoy Ghassan Salame sat next to him stone-faced with folded arms.
Guterres stayed in the fortified U.N. compound on Tripoli’s outskirts for the night and plans to meet Haftar on Friday, a U.N. spokesman said.
But there was no sign that the east was willing to stop a move that was announced by Haftar in a speech full of talk about victory.
“To our army which is stationed at the outskirts of Tripoli. Today we complete our march,” he said in an audio tape.
Haftar, called “Mushir” by supporters, which means “field marshal” in Arabic, has built his name by fighting Islamists. But many of his opponents see him as a new Muammar.
The governments of France, Italy, the United Arab Emirates, Britain and the United States said in a joint statement that they were deeply concerned about the fighting.
Setback
The offensive is a setback for the United Nations and Western countries which have been trying to mediate between Serraj and Haftar, who met in Abu Dhabi last month to discuss a power-sharing deal.
The conference the U.N. is helping to organize is aimed at forging agreement on a road map for elections to resolve the prolonged instability in Libya, an oil producer and a hub for refugees and migrants trekking across the Sahara in the hope of reaching Europe.
Haftar enjoys the backing of Egypt and the United Arab Emirates, which see him as bulwark against Islamists and have supported him militarily, according to U.N. reports.
Haftar has also fostered ties with Saudi Arabia where he was received by King Salman last week. No details have emerged, but analysts say the visit likely helped him boost ties with ultra-conservative Muslim Salafists, who are counted among his troops and follow Saudi preacher Rabae al-Madkhali.
The Salafists are also based in the west of Libya including Tripoli, where a Salafist force controls the airport. It is allied to Serraj, but has changed sides before like other groups in the capital. Serraj has no full-time troops.
The offensive followed the same pattern used by anti-Gaddafi rebels in 2011, with the main thrust at Tripoli coming from the south. Gharyan is strategic because it is the last town before a coastal plain, and a base for fighters to fall back to if a battle for the capital drags on.
A group allied to Haftar also moved to take a checkpoint 27 km west of the capital, hoping to cut the coastal road to Tunisia, Tripoli’s lifeline, residents said.
Haftar’s biggest opponent is Misrata, a western city home to strong forces which also have aircraft, analysts say. It is known for resisting old regime figures, including in 2011 when forces loyal to Gaddafi besieged it for three months.
Evoking this spirit, members of Misrata armed groups said in video message they will they stop Haftar and his “zahaf”, Arabic for crawl, a word used by Gaddafi for his popular marches.
