Battles raged across the city throughout Saturday as forces aligned with the parliament-backed administration of Fathi Bashagha failed to take control of the capital and oust the Tripoli-based government of Abdulhamid al-Dbeibah.
The pre-dawn seizure of Zeidan came five days after US commandos embarrassed and angered Libya's government by capturing senior Al-Qaeda suspect Abu Anas al-Libi off the streets of Tripoli and whisking him away to a warship.
The militia, which had been hired by the government to provide security in Tripoli, said it "arrested" Ali Zeidan after US Secretary of State John Kerry confirmed Libya's role in the weekend capture in the city of Abu Anas al-Liby.
Vienna prosecutors have ruled out foul play in the death of Libya's Gaddafi-era prime minister and oil chief Shokri Ghanem, concluding he drowned after suffering a heart attack, Austrian media reported on Wednesday.
Libya has started investigating foreign oil companies over their past relationships with the former Muammar Gaddafi government, an investigator with the ruling National Transitional Council (NTC) said on Monday.
Muammar Gaddafi's son Saadi warned on Friday of an imminent uprising in Libya, saying he was in regular contact with people in the country who were unhappy with the authorities put in place after the ousting and killing of his father.
A month after Muammar Gaddafi was captured and killed, his son Saif al-Islam was seized without a fight by Libyan militiamen who are now holding him in their mountain stronghold until Tripoli has a government to try him.
A day after Libyans declared a "liberation" that consigned Muammar Gaddafi to the "garbage bin of history", hundreds again filed past his rotting corpse in a grim display that has raised questions about the nation's new direction.
Libya's former rebels have surrounded the ousted dictator Muammar Gaddafi, and it is only a matter of time until he is captured or killed, a spokesman for Tripoli's new military council said today.
Libya's new leaders moved to restore order to Tripoli today, instructing fighters from the provinces to go home as they prepared to transfer to the capital from their wartime base in Benghazi.
Libya's rebels announced today the transfer of their leadership to Tripoli from their Benghazi base, boosted by a United Nations decision to release millions of dollars of cash aid within days.
While rebels advanced to Tripoli and took control of large parts of the Libyan capital while Colonel Gaddafi abandoned his compound, the question now is how easy will be the post-Gaddafi transition and what are the implications for the Arab world and for the international oil market?
Rebel forces began to purge Tripoli's streets of diehard gunmen still loyal to fugitive Muammar Gaddafi on Thursday in the final phase of the battle for the Libyan capital.
Libya's new masters offered a million-dollar bounty for the fugitive Muammar Gaddafi on Wednesday, after he urged his men to carry on a battle that kept the capital in a state of fear.
Tripoli celebrated into the early hours of today after rebels overran Muammar Gaddafi's compound, despite finding no sign of the Libyan strongman or his sons.
Web access is slowly returning to Libya.
Brent crude fell almost USD 2 on Monday towards USD 106 a barrel with traders and investors anticipating the resumption of oil exports from OPEC-member Libya as a six-month civil war there appeared close to an end.
Euphoric Libyan rebels took control of most of Tripoli in a lightning advance, celebrating the victory in Green Square, the symbolic heart of Muammar Gaddafi's regime.
Jubilant rebel fighters swept into the heart of Tripoli as Muammar Gaddafi's forces collapsed and crowds took to the streets to celebrate what they saw as the rapidly approaching end of his four decades of absolute power.
Libya's rebel forces today said an overnight night NATO strike on an operations centre in the western town of Zliten has killed Muammar Gaddafi's son Khamis, and more than 30 others.
Muammar Gaddafi stood defiant in the face of the heaviest and most punishing NATO airstrikes yet at least 40 thunderous daylight attacks that sent plumes of smoke billowing above the Libyan leader's central Tripoli compound.
Defiant Libyan leader Muammar Gaddafi vowed on Saturday not to quit, but said he was ready for a "ceasefire and negotiations" as NATO bombed a key government complex in Tripoli while the Libyan regime stepped up the offensive in the besieged western city of Misurata.
Forces loyal to Libyan leader Muammar Gaddafi are staging a "massacre" in the besieged city of Misrata, evacuees said on Monday, as Libya said it was ready to discuss political reform, led by Gaddafi.
Libyan rebels pulled out of the oil town of Ras Lanuf on Wednesday under heavy bombardment from Muammar Gaddafi's forces, showing up their weakness without Western air strikes to tip the scales in their favour.
Western forces today pounded several Libyan military targets across Tripoli as fighting raged in a number of cities between the rebels and forces loyal to Muammar Gaddafi and NATO allies tried to overcome differences over the role they should play in Libya.