Is Gaddafi's leadership doomed?
UK Foreign Secretary William Hague has urged the Libyan leadership to behave with "humanity and restraint".
Over 200 people are reported to have been killed during protests against the Libyan leader.
One of Colonel Gaddafi's sons warned of the threat of civil war, saying that his father's supporters would keep fighting until the last man and the last bullet.
The BBC's James Robbins reports.