Rights groups say there is a rising death toll from clashes between anti-government protesters and security forces in Libya.

Amnesty said 43 people had died in protests on Thursday, while other reports suggested dozens more were killed on Friday.

The government has blocked websites and shut off electricity in some areas.

State media outlets have warned of retaliation against anyone criticising Libyan leader Muammar Gaddafi.

The mainstay of the unrest is in regional towns and cities, where many people live in poverty.