Libya is one of several Arab countries to have experienced pro-democracy demonstrations since the fall of long-time Tunisian President Zine El Abidine Ben Ali in January. Egypt's Hosni Mubarak was forced from power on 11 February.
The main focus of the demonstrations against Col Muammar Gaddafi's 42-year rule has been the second city Benghazi, where security forces are said to have attacked protesters again on Saturday.
On Friday, one hospital in the city reported 35 deaths.
State media have warned of retaliation if the unrest continues.
Media restrictions make it difficult to verify reports independently but the BBC has confirmed that websites including Facebook and al-Jazeera Arabic were blocked.
The number of people killed in three days of protests in Libya has risen to 84, according to the New York-based group Human Rights Watch.
On Friday, one hospital in the city reported 35 deaths.
State media have warned of retaliation if the unrest continues.
Media restrictions make it difficult to verify reports independently but the BBC has confirmed that websites including Facebook and al-Jazeera Arabic were blocked.