<p><br /> Members of a Libyan army unit have told Benghazi residents they had defected and "liberated" the city from veteran leader Colonel Muammar Gaddafi.<br /> </p><p><br /> Habib al-Obaidi, who heads the intensive care unit at the main Al-Jalae hospital, and lawyer Mohamed al-Mana said members of the Thunderbolt squad had arrived at the hospital in Libya's second city with soldiers wounded in clashes with Gaddafi's personal guard.<br /> </p><p><br /> "They are now saying that they have overpowered the Praetorian Guard and that they have joined the people's revolt," Mr al-Mana said by telephone.<br /> </p><p><br /> Obaidi said the bodies of 50 people killed on Sunday had arrived at the hospital in the late afternoon. Most had died from bullet wounds.<br /> </p><p><br /> Sunday's bloodshed follows the deaths of scores of protesters on Saturday in one of the most violent days since protests began sweeping through the Arab world two months ago.<br /> </p><p><br /> Residents said tens, perhaps hundreds of thousands of protesters had taken to the streets of the city to bury scores of dead killed in the last 24 hours. A witness said security forces opened fire on them.<br /> </p><p><br /> The United States said it was "gravely concerned" by what it called credible reports hundreds of people had been injured or killed.<br /> </p><p><br /> The Foreign Secretary, William Hague, urged Libya to begin dialogue with anti-government protesters and implement reforms, in a phone call to a son of Gaddafi on Sunday.<br /> </p><p><br /> In Brussels, the Hungarian EU presidency said Libya had told the European Union it would stop cooperation with the bloc in stemming illegal migration to Europe if the EU encourages pro-democracy protests in the country.<br /> </p>
