Supporters and opponents of longtime Libyan President Moammar Gadhafi continue to fight for control over the country's major cities, as international pressure calling for Gadhafi's resignation mount.
President Barack Obama strongly condemned Gadhafi during a press conference at the White House on Thursday.
"The violence must stop," the president said. "Moammar Gadhafi has lost the legitimacy to lead and he must leave. Those who perpetrate violence against the Libyan people will be held accountable, and the aspirations of the Libyan people for freedom, democracy and dignity must be met."
Gadhafi, who has been the leader of Libya for more than 40 years, is still clinging to power. Opposition forces have been able to fend off attacks by his forces in several cities, including areas important because of oil, according to The Associated Press.
But Gadhafi's forces are putting up a fight. The AP reported that more than a dozen people were killed when government forces attacked a city near Tripoli, in an attempt to consolidate government power.
Libya's uprising is now in its third week. It's one of several nations in the region to experience political upheavals in recent weeks.