Protests in Bahrain have spread from the capital Manama towards other towns, including Sitra and Karrana.

Several members of the country's opposition are said to have been arrested, and at least six people were killed after security forces moved in to crush anti-government demonstrations.

The recent violence in the Gulf state has brought international condemnation, with countries as far apart as the US and Iran expressing concern.

Al Jazeera's Alan Fisher reports.