Switzerland says it has frozen nearly $1bn worth of assets linked to Libya's Muammar Gaddafi and the deposed leaders of Egypt and Tunisia. Swiss Foreign Minister Micheline Calmy-Rey said some 830m Swiss francs (£580m; $960m) had been discovered. Of that, the largest proportion - 410m SFr - was linked to former Egyptian President Hosni Mubarak and his circle, the minister said.