The United Nations refugee agency says about one hundred thousand people have fled the violence in Libya to neighbouring countries in the past week. Figures from the agency said the majority of them are foreign migrant workers. The United Nations Security Council has unanimously approved sanctions against the Libyan leader, Col. Gaddafi and his close associates in response to their use of violence against civilian demonstrators. It agreed to impose an arms embargo on Libya, freeze the assets of the Gaddafi family and referred the Libyan authorities to the International Criminal Court.The British Foreign Secretary, William Hague, has said the Libyan leader should now step down. Last night he signed a directive revoking diplomatic immunity of Mummar Gaddfi, as well as that of his son, his family and his household in the UK.Meanwhile, latest reports from the Libyan town of Zawiya say forces opposed to Col. Gaddafi are wholly in control of its centre and the area around it despite claim to the contrary by the authorities in Tripoli. However, the town is surrounded by pro-Gaddafi forces.