THE cause of a fire that destroyed a whole plant of the Juhaina Milk Factory in the 6th of October City early on Thursday is still unclear, Cairo police said on Friday. The fire, which broke out in the yogurt producing facility, has burnt the whole building, which contained raw materials and equipment worth LE350 million, the police said, adding that they could not charge anybody at the moment because things were still unclear. Witnesses and local media have said the fire could have been caused by an electrical fault. Three security guards and two firemen were taken to hospital after inhaling smoke, medical sources said. The Fire Department has sent more than 20 fire trucks to fight the blaze, the police said.