The Libyan government's response to the protests has been the bloodiest of any of the countries affected by demands for change.
Several of Colonel Gaddafi's sons hold high profile positions in public life.
Last night, one of the most widely known of the sons, Seif al-Islam said on state television that his father and security forces would fight "until the last bullet".
But even as he was speaking there were clashes going on around Green Square in central Tripoli, which lasted until this morning.
Today the streets have been shut down by the security services.
BBC Focus on Africa's Hassan Arouni asked Dr Mary-Jane Deeb, a US-based specialist on Libya, what she made of Seif el-Islam's stance on the protests.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.