A senior National Transitional Council official in Libya has told Al Jazeera that Saadi Gaddafi, the third son of deposed leader Muammar Gaddafi, is willing to give himself up.

Abdelhakim Belhaj, the NTC's military leader in Tripoli, said on Wednesday that Saddi called him and asked if he can surrender. In an exclusive interview, Belhaj said the revolutionaries know for sure where some of the regime leaders are, including unconfirmed reports on where Gaddafi is.

"Gaddafi is now fleeing - and we have a good idea where he is," Ali Tarhouni, a senior NTC minister said earlier, without elaborating. "We don't have any doubt that we will catch him." There has been speculation that Gaddafi is seeking refuge in Sirte or one of the other remaining regime strongholds, among them the towns of Bani Walid or Sabha.

Al Jazeera's James Bays, reporting from Tripoli said: “We asked him [Belhaj] about the military situation, remaining members of the Gaddafi family, and he said that he believes one of Gaddafi's sons, Saadi, is preparing to surrender.