( CNN ) -- The businessman son of embattled Libyan leader Moammar Gadhafi appears to be out of rebel hands and says he wants to negotiate a cease-fire to save Tripoli from `` a sea of blood . '' In an e-mail exchange with CNN Senior International Correspondent Nic Robertson , Saadi Gadhafi -- whose capture had been announced by the rebel leadership on Sunday -- said he had the authority to negotiate and wanted to discuss a cease-fire with U.S. and NATO officials . `` I will try to save my city Tripoli and 2 millions of people living there ... otherwise Tripoli will be lost forever like Somalia , '' he wrote . Without a cease-fire , he added , `` Soon it will be a sea of blood . '' Saadi Gadhafi was one of three sons of the now-hunted Libyan leader who the rebel National Transitional Council announced had been captured during their weekend advance on Tripoli . However , they said Monday that one of the other two , Mohammed Gadhafi , had escaped . And Saif al-Islam Gadhafi -- a top adviser to his father -- made an appearance before international journalists early Tuesday to refute reports of his arrest . Where is Libya 's leader , and how long can he hold out ? There was no immediate comment from NTC officials on Saadi Gadhafi 's status or his offer , made a day after rebel forces overran his father 's Bab al-Aziziya compound and claimed control over nearly all of Tripoli . Libyan government officials have made several previous cease-fire offers during the course of the six-month revolt against Gadhafi 's 42-year rule .
Saadi Gadhafi exchanged e-mail with a CNN correspondent . He said he wants `` to save my city Tripoli '' from a humanitarian crisis . He had been reported captured by rebel forces on Sunday .