Pearl Square has been the focus of opposition protests
State TV said the military had announced a curfew in parts of the city
Security forces in Bahrain have used tanks, tear gas, water cannon and helicopters to drive hundreds of anti-government demonstrators from their camp in Pearl Square, in the capital Manama.
The opposition say there were at least five deaths and hundreds of injuries, although this cannot be independently confirmed.
Officials said three police were killed.
Abdul Jalil Khalil is the leader of Bahrain's main opposition bloc, Al-Wefaq.
To play this content JavaScript must be turned on and the latest Flash player installed.
Doctors told the BBC the security forces were stopping them from treating people injured in the violence, with no one allowed to leave or enter the main Salmaniya hospital.
Ahdeya Ahmed is a government information affairs official.
To play this content JavaScript must be turned on and the latest Flash player installed.
First broadcast 16 March 2011
BBC © 2014 The BBC is not responsible for the content of external sites. Read more.
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.