12.50pm: Here's a summary of the latest developments:
• Muammar Gaddafi has been captured fleeing Sirte, according to unconfirmed reports by some National Transitional Council officials. The NTC's information minister, Mahmoud Shamman, refused to confirm the reports, but said "big fish" are on their way to Misrata. Gaddafi is reported to have been critically injured in both legs while being detained. "Don't shoot, don't shoot," he is reported to have said. We cannot confirm that he has been captured.
• A number of high ranking Gaddafi officials are also reported to have been caught including his spokesman Moussa Ibrahim and his cousin Ahmed Ibrahim. "We hope that we are catching some big names so we can put them in the court and let the people have the last word on their fate," Shamman said.
• Reports of the arrests came after the fall of Gaddafi's final stronghold of Sirte. The city was captured after a 90 minute offensive this morning. Fighters hoisted flags of the new interim government over the city and burned the green flag of the ousted Gaddafi regime. "Sirte has been liberated. There are no Gaddafi forces any more," said Colonel Yunus Al Abdali.
• Mahmoud Jibril, Libya's Interim Leader, has hinted that he may step down today. In an interview with Time magazine he also complained about political infighting in the new Libya.
12.45pm: According to Sky News, the Dutch prime minister, Mark Rutte, is calling the capture of Gaddafi good news.
Sky News is now saying its sources are confirming the capture.
We still cannot confirm this.
12.32pm: The Libyan immigration minister, Ali Errishi, has just told al-Jazeera that he has spoken to fighters who have told him Gaddafi has been captured, along with his spokesman Moussa Ibrahim. But still we await independent confirmation. Errishi said Gaddafi is wounded, adding:
He is, as we speak, in the custody of the freedom fighters ....I'm very, very confident [in my sources] ...They would not have woken me up early in the morning all the way from Misrata, I am in [Washington] DC [if it was not true].
Al-Jazeera is reporting that Nato forces fired on the convoy, although that report is also unconfirmed.
12.22pm: Reuters is quoting NTC official Abdel Majid as saying Gaddafi has been wounded in both legs.
12.18pm: An NTC official has told al-Jazeera that Gaddafi has been captured and was wounded while being detained. There is still no independent verification available.
12.15pm: A Libyan TV station has reportedly just announced thatMuammar Gaddafi has been captured. The report cannot be confirmed at this stage.
Mahmoud Shammam, the NTC's information minister. was just on al-Jazeera, and alluded to the capture of Gaddafi but refused to confirm it.
I think we can say that Sirte is liberated ...I think the celebrations are going on right now. Also there's big talk about some big fish on their way to Misrata. I cannot confirm anything but people over there are talking they caught a big fish.
Asked what would happen if Gaddafi had been captured, Shammam said:
We are going to put him in fornt of the court, we're not going to hang him in the street. We are going to give him the fair trial he never gave the Libyan people. We hope that we are catching some big names so we can put them in the court and let the people have the last word on their fate ...I think every Libyan wants to see Gaddafi stand trial.
12.07pm: Please treat the following with lots of caution, but the Misrata Military Council is reporting that Gaddafi himself has been arrested.
This is not confirmed. In an email the Information Centre for the Misrata Military Council said:
Now in contact with our correspondent at the front of the Sirte. The tyrant Muammar Gaddafi Was arrested. God is great and thank God
12.01pm: We may have spoken too soon about Nato's involvement in Sirte.
By the way, yesterday there was a wedding in Bab Ben Ghashier, nobody fired a single shot in the air. Only fireworks. it was a great moment.
11.22am: Reuters has more on the hoisting of the government flag in Sirte:
Libyan interim government fighters hoisted the new national flag above the centre of Sirte on Thursday after completing their capture of Muammar Gaddafi's home town, the last serious pocket of resistance by loyalists of the ousted leader.
A Reuters witness said celebratory gunfire broke out among National Transitional Council forces as the flag was raised above a large utilities building in the Mediterranean city, which had been under NTC siege for nearly two months.
The network is now confirming that Sirte has fallen. It also reports that one of Gaddafi's cousins, Ahmed Ibrahim, was arrested trying to flee Sirte in that convoy.
Ibrahim was responsible for education under the Gaddafi regime.
11.03am: Al-Jazeera is being cautious about reports that Sirte has fallen. It says government forces are "poised" to take the city, while it shows pictures of fighters celebrating victory and burning the green flag of the Gaddafi regime.
Al Jazeera's James Bays, reporting from Tripoli, said: "Some high level members [of the NTC] ... are aware of the pictures [of Sirte] being broadcast.
Jibril, who heads the executive board of the rebels' National Transitional Council, did not say exactly when he would resign, but hinted that it could be as soon as Thursday, when a televised meeting of his group would detail what it had accomplished since Gaddafi's ouster, he said. In a grim assessment of Libya's current state, Jibril suggested that as the war dragged on, he had found governing the country was increasingly difficult.
10.16am: AP has more details on the fall of Sirte:
Libyan fighters have overrun the last positions of Gaddafi loyalists holding out in the city of Sirte and the revolutionaries now have all of the ousted leader's hometown within their hands.
Reporters on the scene say the final push to capture the remaining pro-Gadhafi positions began around 8am on Thursday and was over after about 90 minutes. Just before the assault, about five carloads of loyalists tried to flee the enclave down the coastal highway but were killed by revolutionaries.
Revolutionaries began searching homes and buildings looking for any Gaddafi fighters who may be hiding there.
Reuters has quotes from commanders:
"Sirte has been liberated. There are no Gaddafi forces any more," said Colonel Yunus Al Abdali, head of operations in the eastern half of the city. "We are now chasing his fighters who are trying to run away."
Another front line commander confirmed the capture of the Mediterranean coastal city, which was the last remaining significant bastion of pro-Gaddafi fighters almost three months after the ex-leader was overthrown by rebels.
10.05am: Government forces have captured the last remaining Gaddafi positions in Sirte, Reuters confirms, citing frontline commanders.
10.02am: Breaking: AP is reporting that Sirte has fallen.
Witnesses: Libyan fighters overrun last positions of Gadhafi loyalists in Sirte, city falls.
9.49am: Some residents are returning to Sirte to protect their homes from being looted by forces loyal to the new government, the BBC reports.