Anti-government protesters have taken to the streets of Tunisia's capital, Tunis, ahead of an announcement of a new national unity government.
Police used water canon to disperse several hundred demonstrators calling for the party of ousted President Zine al-Abidine Ben Ali to relinquish power.
The country has been in a state of emergency since he fled on Friday.
Prime Minister Mohammed Ghannouchi has said an agreement between the political parties would be unveiled later. BBC News
