In Libya, heavy fighting is reported in Tripoli around the compound of embattled leader Col Muammar Gaddafi after rebels seized control of much of the city on Monday. A rebel spokesman said, pro-Gaddafi forces still control about one fifth of Tripoli. He said, tanks emerged from Col Gaddafi's Bab al-Azizia compound early Monday morning and began firing. Sustained gunfire has been heard in the area. The rebels also said they had captured Col Gaddafi's son Saif al-Islam, but there is no word of his whereabouts. Another son, Mohammad Gaddafi is under house arrest. He was captured in dramatic circumstances while giving an interview to Al-jazeera. The whereabouts of Libyan strongman Muammar Gaddafi, who has ruled the oil rich nation uninterrupted for 42 years remains a mystery as rebel forces swept into the capital Tripoli to jubilant crowds. A diplomatic source told the AFP news agency that Col Gaddafi could still be in his compound Bab al-Azizia and Command centre. The Rebel National Transitional Council Chairman Mustafa Mohammed Abdul Jalil said the rebels will halt their offensive if Col Gaddafi announced his departure. He added that rebel forces will give Col Gaddafi and his sons safe passage out of the country. The International Criminal Court has issued arrest warrants for Col Gaddafi, his son Saif al-Islam, and the head of the intelligence service, Abdullah al-Sanussi, for crimes against humanity. The Court's prosecutor Luis Moreno Ocampo said he had been informed of Saif al-Islam's arrest. Throughout the night, jubilant crowds remained in central Green Square, previously the scene of nightly pro-Gaddafi demonstrations. Rebel supporters tore down the green flags of the Libyan government and trampled on portraits of Colonel Gaddafi. Rebels met little resistance as they swept in from east, south and west. In an audio message broadcast late on Sunday, the Libyan leader urged residents to “save Tripoli” from the rebels. Libyan Information Minister Moussa Ibrahim said that the Gaddafi government still had 65,000 loyal soldiers under its command. However, some forces have surrendered to the rebels, including the special battalion charged with securing Tripoli. Ibrahim said fighting in the city since noon on Sunday had left 1,300 people dead and 5,000 wounded. There is no confirmation of the figures. Western leaders have welcomed the rebel advance and urged Col Gaddafi to go. US President Barack Obama in a statement that tonight, the momentum against the Gaddafi regime has reached a tipping point and Tripoli is slipping from his grasp. British Prime Minister David Cameron, who is cutting short his holiday to chair a meeting of the National Security Council, said it is clear that the end is near for Gaddafi. He said the Libyan leader had committed appalling crimes against the people of Libya and he must go now to avoid any further suffering for his own people. The rebels move began on 17th February after uprisings in Tunisia and Egypt and they entered Tripoli with little sign of the expected stiff resistance after 5 and half months of fighting.