From Al Jazeera -- Libya clashes spread to Tripoli:
Clashes between anti-government protesters and Gaddafi supporters escalate as army unit 'defects' in Benghazi.
Security forces have shot dead scores of protesters in Libya's second largest city, where residents said a military unit had joined their cause.
While Libyan leader Muammar Gaddafi attempted to put down protests centred in the eastern city of Benghazi against his four-decade rule, Al Jazeera began receiving eyewitness reports of "disturbances" in the capital Tripoli early on Monday as well.
There were reports of clashes between anti-government protesters and Gaddafi supporters around the Green Square.
"We are in Tripoli, there are chants [directed at Gaddafi]: 'Where are you? Where are you? Come out if you're a man," a protester told Al Jazeera on the phone.
A resident told the Reuters news agency that he could hear gunshots in the streets and crowds of people.
"We're inside the house and the lights are out. There are gunshots in the street," the resident said by phone. "That's what I hear, gunshots and people. I can't go outside."
An expatriate worker living in the Libyan capital told Reuters: "Some anti-government demonstrators are gathering in the residential complexes. The police are dispersing them. I can also see burning cars."
There were also reports of protesters heading to Gaddafi's compound in the city of Al-Zawia near Tripoli, with the intention of burning the building down.
Meanwhile the head of the Al-Zuwayya tribe in eastern Libya has threatened to cut off oil exports unless authorities stop what he called the "oppression of protesters", the Warfala tribe, one of Libya's biggest, has reportedly joined the anti-Gaddafi protests.
Speaking to Al Jazeera, Shaikh Faraj al Zuway said: "We will stop oil exports to Western countries within 24 hours" if the violence did not stop. The tribe lives south of Benghazi, which has seen the worst of the deadly violence in recent days.
Akram Al-Warfalli, a leading figure in the Al Warfalla tribe, one of Libya's biggest, told the network: "We tell the brother (Gaddafi), well he's no longer a brother, we tell him to leave the country." The tribe lives south of Tripoli.
Protests have also reportedly broken out in other cities, including Bayda, Derna, Tobruk and Misrata - and anti-Gaddafi graffiti adorns the walls of several cities.