Tower fans like the one believed to have caused a near-fatal fire two weeks ago are potentially hazardous and should be returned to retailers immediately. Yesterday's warning by the Electrical and Mechanical Services Department came just two days after the supplier of the Pierre Cardin fans claimed the model was safe and that customers could continue using them without fear. All the fans are to be recalled. The department's warning came after more than 140 fans with the model number HST-1T were examined after the accident at a flat in Public Square Street, Ya Ma Tei, in which Lau Yuk-ting, seven, was seriously injured and five other people were hurt. The girl was still in a serious condition in Kwong Wah Hospital last night. Doctors said earlier her chance of surviving was less than 50 per cent. About 3,000 fans of this model were sold through Mannings between April and July last year. 'The preliminary findings showed that the electric supply cables inside some of these fans are damaged,' a department spokesman said. 'The cables of some 40 samples were worn out to various degrees when operated for a long time which may cause a short circuit and thus a fire in some extreme cases.' Full laboratory results are expected early next month. The findings were in stark contrast to supplier Evergreen's statement on Monday, which said all the Pierre Cardin electrical products met international standards and were safe. The company stated in a half-page advertisement in several papers that test reports from two experts at the Polytechnic University had been misquoted by the press, creating panic. It also said the fans met international standards recognised by Hong Kong. But a spokesman for the Electrical and Mechanical Services Department yesterday said the advertisement was misleading. 'Some information was factually wrong and it's misleading to say the safety standards are recognised by the Government. The matter was raised in a meeting with the supplier and retailer today,' she said. Both parties agreed to recall all fans. The supplier was unavailable for comment last night, while Mannings said the advertisement had nothing to do with the company. The public can return fans to any of the 101 Mannings stores for a full refund.