CNN 's Raja Razek and Ingrid Formanek contributed to this report . Government forces surround the city from all sides , an official says . Those loyal to Moammar Gadhafi flee to southern part of the city , he says . The United Nations cites reports of prisoner torture by the government .
Government forces surround the city from all sides , an official says . Those loyal to Moammar Gadhafi flee to southern part of the city , he says . The United Nations cites reports of prisoner torture by the government .