More than 100 people have died over four days of anti-government protests in the eastern Libyan city of Benghazi as Colonel Muammar Gaddafi confronts the most serious challenge to his 42-year rule as leader. The Libyan army is reported to have fired into unarmed crowds of protesters, killing around 20 people on Saturday alone and after 35 people were believed to have been killed on Friday. Human Rights Watch said the death toll estimates were conservative. Around 15 were reported to have been killed after government forces opened fire during a funeral. One doctor in Benghazi, Libya's second city, said victims had come in to hospital suffering wounds caused by high-velocity rifles used by security forces. Foreign journalists have been banned from entering the country since the start of the protests, and Gaddafi has so far made no comment on the escalating violence despite growing condemnation from western leaders.