GENEVA (AFP) - Four diamonds worth millions were stolen on Wednesday from the worlds biggest watch and jewellery fair in the northern Swiss city of Basel, the local prosecutors office said. On Wednesday, 30 March 2011, at around 11.00 am (0900 GMT), one of the as yet still unidentified perpetrators distracted an employee of a diamond trader in the exhibition hall 3.0, and stole four diamonds worth millions from the display window, said Markus Melzl, spokesman of Basels prosecutors office.