i m wolf blitzer. we are watching breaking news, history unfolding in libya. we are following breaking news. we will be in the hours ahead as developments continue. it is early monday morning there in libya. moammar gadhafi is under siege from rebel forces. the rebels say they have two of moammar gadhafi s sons captured. we have pictures of saif. the international criminal court at the hague has an arrest warrant for him. now we are told in the heart of tripoli s green square which they have renamed martyr s square. we heard moments ago that some of them are pushing back with word that gadhafi forces may be going to reenter that part of the city. the government has been saying 1,300 people have been killed over the past 12 hours. our people on the ground have seen no evidence of that though. one of our reporters with the rebels say there are no signs of pro government forces on the streets of tripoli at the moment. our colleague matthew chance is holed up in a hotel in