BBC News with David Austin

Security forces in Tunisia have been fighting a gun battle with suspected members of the presidential guard at the presidential palace, several kilometres north of the capital Tunis. The Tunisian Prime Minister Mohamed Ghannouchi told national television that there'd be zero tolerance for anybody who'd threatened the country's security following the overthrow of President Zine El Abidine Ben Ali last Friday. Mr Ghannouchi has said a new coalition government could be announced on Monday. With more on the day's events, here's Wyre Davies.