BBC News with Marion Marshall

Reports are emerging of large protests in Libya's second city Benghazi following calls for "day of rage" demonstrations. According to eyewitnesses, thousands of people are on the streets, chanting "the people want to topple the colonel", a reference to Colonel Gaddafi, who's ruled Libya for more than four decades. There are also reports of protests in Zenten and in al-Bayda, where protests broke out on Wednesday. Jon Leyne reports.