Tunisian prosecutors have opened an investigation into foreign assets of toppled President Zine al-Abidine Ben Ali and his family, reports say. The inquiry will examine possible illegal transactions and foreign bank accounts, the official TAP news agency reported. The move came as Swiss officials ordered a freeze on any funds held there by Mr Ben Ali. Meanwhile, hundreds of protesters have again rallied in the Tunisian capital. They are lined up against hundreds of riot police but so far there have been no reports of violence. As the political turmoil continues, Tunisia's national unity cabinet is reported to have postponed its first meeting. Mr Ben Ali fled to Saudi Arabia on Friday following a spate of violent protests across Tunisia over unemployment, poverty and corruption. Four opponents of Mr Ben Ali quit the unity government within a day of being appointed, in protest at the number of ministers from the old regime who were still included. Private jet In Geneva, Swiss Foreign Minister Micheline Calmy-Rey said the decision to freeze any funds of Mr Ben Ali was to prevent assets being withdrawn and also to ensure that a new Tunisian administration would be able to retrieve assets taken illicitly. The ban also applies to any assets held by "his entourage", the foreign ministry said in a statement. A Swiss judicial source told Reuters news agency that an association of Tunisians living in Switzerland had sought the freezing of assets including a building on Geneva's exclusive Rue du Rhone and a Falcon 9000 jet said to be at Geneva airport. In central Tunis on Wednesday, hundreds of protesters waved banners and chanted, calling for all links to the old regime to be severed. "This will continue every day until we get rid of the ruling party," said Faydi Borni, a teacher. "We got rid of the dictator but not the dictatorship. We want rid of this government that shut us up for 30 years." The UN said on Wednesday it would send a team of human rights officials to Tunisia to investigate the recent violent protests in which more than 100 people have died. "This team should be on the ground by next week," UN High Commissioner for Human Rights Navi Pillay said in Geneva. Source: BBC